I have a flip w/ a lot of unearned gain in it, and am happy to be leasing it for (at least) a year to get cap gains tax treatment.

Unless you have elected corporation tax treatment for your LLC, the LLC is a pass-through entity.  

Capital gains are for an asset that you intend to buy and hold, not fix and flip or even build from the ground up.The IRS says this:The following transactions result in gain or loss subject to section 1231 treatment.

I am a chemical engineer in the water treatment community and am currently serving in the Army as an officer.  

Furthermore, investors get excellent tax treatment that aren't possible in mutual funds, etc.  

This could fall under a 'no smoking' clause if you have one in the lease, but if they have a card, it may not be enforceable as it is a 'medical treatment'.

I actually want the resident to buy the house after a year, so I can get a large back end, no RE commission, and preferential tax treatment. 

I was so naïve.Thomas’ 24-year-old renter is typical of many young addicts who come from the Northeast and Midwest to Palm Beach County for treatment.

Past history, current practice, tax return treatment are all a part of the picture you paint. 

Treatment programs were pursued with vigor leaving little time to manage the preschool, which my wife unexpectedly closed, to my great surprise and at a great financial loss.