Indoor trainer v Indoor bike, indoor gym ideas

I have used exercise bikes at the gym included a few models of the bikes used for the spin classes and a few models of bikes with power/speed/HR readouts.  I like my own bike on the bike trainer at home better.  That bike was fit to me and it is set up to my exact specifications.

I have my bike trainer in the garage.  It is not heated and during the winter when it gets to 45-55 deg F in there are feels great for cycling.  In the summer I have to get a three-foot fan in there to blow while I am cycling and still am a puddle 15 minutes into the ride.  I cleaned out the garage a few weeks ago and pulled out some of the floor rugs from our previous home that haven't been used in 5-6 years and put it under the trainer to make it look nice.  I have a yoga mat that is not one top of the floor rud that used to be all I kept under the bike trainer.  I don't know where my wife picked up the floor rug but I saw an email go out from the gym where I swim stating that any personal Yoga mats the were picked up from there studio by the 18th would be thrown out so I was wondering if I could get some free mats from there to put under the bike.  :-)

I do yoga in my living room or bedroom on the carpet where it is warm and has a soft surface.  I cool cement floor might not be as inviting for Yoga and it is for indoor cycling or a treadmill.  I would think the foam liners that go under carpet with a floor rug or yoga mat on top of it would be ideal for yoga.  I was a wrestler in high school and often thought a wrestling mat to cover the exercise room would be  really nice I think those mats are more than a Persian rug though so I would just get the cheap foam liner for carpet and cover it with a floor mat that looks good.

No personal experience on the Sole F80 but that's one of the highest independently-rated treadmills out there.  If I were to buy one, either that one or its non-folding equivalent the F77 would be my choice.

We have both an Echelon fitness bike and my Ridley road bike attached to a Kurt Kinetic dumb trainer.  Both work for exercise.  Both can swap out whatever pedals you want, can be adjusted, etc.  I don't think you can go wrong either way, but the dumb trainer way will be much cheaper (the Echelon was about $1400, the KK about $300).

You stated you're not training for anything specific, but I would at least grab a speed sensor and track distance.

On a concrete floor I'd get some indoor/outdoor carpet vs. a mat, or as noted above some old carpet.  My pain cave is already carpeted so that's what we use.  I get it steam cleaned every 2-3 years.  If you're going to add core work, yoga, etc. grab a yoga mat.

Get a fan and make sure your internet works well where you're going to be watching/streaming.