Hey! I am also a MSP Hawkeye :-
) Assuming it means what I think it means, anyway.
As far as a trainer...I have never had a problem with my trainers eating my tire, so I typically don't have a separate wheel or tire. Some winters, I will put on a crappy tire, but usually, I am too lazy to do so.
I don't use a riserblock--just a book or two or magazines or whatever, depending on which bike is on the trainer.
I also don't use a sweat net or anything--a towel or shirt works just fine.
Trainers, like many other things, can go from around $100 to $1000+ if you buy something with all the bells and whistles. That being said, I have been using my mag trainer from nashbar, and its sister the Nashbar fluid trainer, for many years, and have zero complaints.
When I got my mag, it was about $75 on sale. It's a bit more now, but still pretty darn inexpensive.
(Ditto for the fluid, which you can get now around $150
) It's quiet--I can watch TV, it's reliable, it's strudy, and it was inexpensive. I do get a lot of use out of mine...I also ride mine in the summer a lot, in addition to the winter and the shoulder seasons.
Long story short, you can send as much as you want on a trainer...there are lots of options. But you don't NEED anything except your trainer and maybe a skewer, if yours doesn't fit in the trainer.