It will probably only get used during the winter. and I can see some maintenance issues too with all that moisture inside it would be easy to get mildew or mold growth started if it is not maintained properly and often. also it is traditional to follow up your time in the sauna with a dive into a nice cold lake (or pool), or at least you might want to have a cold outdoor shower nearby. personally I would spend my money on something like a hot tub before I bought a sauna.

We have central air and sometimes the AC doesn't cool enough in extreme hot weather situations.

Consider using your VA loan benefit to purchase a 2-4 unit.I’m active duty Air Force and purchased three homes with my VA loan benefit.I wish you all the best.

The rental market is still extremely hot and prices are high with inventory low, but I have still been managing to cash flow on the new purchases.     

You'll have to ensure it has adequate air flow with the door closed from the ductwork above and possibly the sprinkler piping which is probably dictated by building coded in your area.

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Thanks for advice, yeah it is definitely in the lease for them to change the air filters but believe it or not sometime they are incapable, can't even put it in the right away wrong air flow directions so I may hire someone to replace the air filters every 90 days esp when they have cats the air filters get clogged real fast, thanks!

The issues I ran into was the local market was already flooded with STR's and in order to be profitable you had to stand out with a home that was either near an attraction (ie great view, Garden of the Gods, Downtown, or a College) or the unit had to have amenities (Hot tub, Instagram Wall, Pickle Ball Court) that would place your listing far and above other similar listings.I think you should strongly consider if you more interested in moving away and starting a life somewhere else, or in creating a cash flowing investment to supplement your income? 

Gas/Heat/Hot Water is included in the rental, when completing the proposed rent form could I ask for more rent money or should I stick to what the property is originally listed for? 

I'm particularly passionate about  Passive IncomeOutside of real estate, I enjoy family, working out, running 2 real estate investors group in Orlando, and creating relationships, and lastly healthy water and clean air purification for homes, schools, for all real estate actually as there is pollution and sickness because of caamination ... our water and the air we. breathe.I'm excited to learn and connect with you all!