Attempting the Half Distance...

Start swimming! 

Don't rent a wetsuit, you need to drop $500 and buy one to go along with the $4500 bike you NEED (that's the sarcasm font)  

A tri suit would be a good investment, I did my HIM using this

http://www.beginnertriathlete.com/shop/shop/item.asp?itemid=4172

and it's << $100.

Have you completed any tri's before?  You said you were new, but what level of new I guess is the question.  This is my first full year of tri's and I still consider myself new.

 I would highly recommend a wetsuit.  There are plenty of places that you can rent a wetsuit for $30 or so for a week, even some mail order places (I can't remember the names, maybe some other BT'rs can point you in the right direction) if you don't want to buy one.  Right now is a good time to buy one if you're serious about the sport because it's getting to the end of the season and a lot of wetsuits are on sale/clearance.  Just look around and get some suggestions for good name brands.

Since there's no info in your logs, what type of workouts are you doing now?  What frequency, distance (or time) for each workout?  I don't mean to be condesending, but do you think you're in over your head?  If you haven't done a tri before, a half-iron is a little ambitious wouldn't you say?  Again, I don't know what your workouts look like or what your base is, etc, but most people start at a sprint and work their way up

 As a fellow clyde, I can tell you nutrition is very important, especially for a half-iron.  Make sure you have your calories dialed in, proper hydration, electrolytes, the whole nine yards if you're going to get this figured out in a very short timeframe.

Really Appreciate the responses!  I've competed in 3 sprint tri's (the same one that comes around each august) 0.5 swim, 13 bike, 5k run. My weight has went from 265 to 235 now to 205 so I'm getting ambitious

 My first love is weight lifting but I'm not anywhere close to someone who can compete in that.  I do interval training which really pumps the heart hard.  I'm not too worried about the run, I figure to be too numb at that point to care how I really feel.

 I'm swimming 3 times a week (at 40 minutes right now and want to hit hour and a half) and three times a week for bike as well, twice a week followed with a 3 mile run (hope to hit a 3 hour bike ride at least twice before the race).  I will run at most twice a week since I've had foot problems (which I'm blaming on my weight haha).  I plan on giving myself a week and a half taper period, I know that's not ideal but the best I can give myself.

 It looks like I'll be renting a full body wet suit, I'm completely convinced that's the way to go.

To answer another question, I'm in WAY over my head and bit off WAY more than I can chew, and I can't wait for it!  I'm really not much of an athlete I just love a huge challenge, I'd like to get under 7 hours which should be semi reasonable.

Please keep it coming! 

Also the "When big boys tri" quote is great!

In contemplating a response and reviewing the others so far, you have been given much to consider and to work on should you go through with the HIM, although I have yet to see a bit of recurring advice applied to races of this length..."respect the distance".

As much as I admire your moxie for attempting an HIM, I don't get the sense you have considered (or perhaps fully appreciate) the magnitude of this endeavor. This is a BIG undertaking - probably at least an hour longer than your recent marathon. Not knowing you personally and the volume of your prior training, it's hard to assess your potential performance in the event, but given the limited time you have to train and your plan for the time you have remaining, I'd be concerned that you will be challenged to gain enough fitness to actually enjoy the event. Add to this your foot injury and I can see a 2+ hour suffer-fest at the end of a long, challenging day. Considering that these things are suppossed to be fun, and remembering how I felt running my first, vastly undertrained, a delay or shorter event (Oly) might be prudent.

Not that my experience is relevant, but my first HIM was a month ago and after nearly a year of training. I had a great time and I suspect a large factor was being ready for it physically.

If you go through with it, heed the advice of the other posters, nutrition and hydration are very important. Build as much fitness as you can in the weeks ahead, but be wary of the foot injury, and not to make it worse. Have fun too.

I hope you take my contrarian comments in the spirit given.

Trust me, the marathon took me 4 and a half hours, I'm fine with plodding till the end and paying attention to my body and what it needs.  I'm seeing a lot of posts about enjoying the race, that thought never crossed my mind  haha  I'm looking forward to surviving the race.  I've never seen my ankles the size they were the next two days after 26.2  haha  I felt horrible and expect the same look and feel if not worse after the HIM

 I've always found with tons of distance training I end up overtraining (still haven't gotten that right).  I've worked on my Core stability/strength for the passed 3 months harder than I ever have, and as of last night completed a 20 mile bike ride with a 5 mile run.  Looking at some training logs I'm behind, but better undertrained than overtrained and a little beat up...I hope.

I've always loved these events and everyone who has posted is a reason why.  Everyone has such a respect for someone trying a distance event, anywhere from a 5k on up to Ultra-distances that it always turns out to be a pleasant time. 

I've been in athletics a long time, this will be my hardest challenge yet, I have never worked out for 7 or so hours straight, so drinking and eating (my two favorite things) I realize must be done constantly.

Me and my $300 aluminum Schwinn, $30 rented wetsuit and under armor shorts will be broken but not defeated!   

Thanks again, and please keep any advice coming!  Good luck in all of your future endeavors as well!!!