I know some investors in their 70's that played small ball when they could have sold an traded up.

This would be more of a cash flow play and forced appreciation over time.  

You have to have a fairly large scale to justify it.

I'd just weigh your expected returns in the market vs your mortgage interest rate.I've actually been tapping the HELOC equity to re-invest into the market which is an aggressive play but if I can beat the interest rate (3.75%), I'll be turning a profit by doing so.

I'd buy my house again today in a heartbeat for our total refi amount, so I guess I did an appreciation-refi-play on my house to pay for a divorce and am at about 20% equity when the dust settles with no revolving debt. 

Can you use the local fair market rent amounts to determine a good rental amount to charge?

I personally wouldn't necessarily recommend this avenue, and I'd imagine it would still be challenging to find a solar contractor willing and able to "get creative", but I have seen this play out before. 

Therefore, it is a fair expectation that you ask the seller.

I think there is a price break somewhere that divides the tenant pools; oddly enough, try raising the rent just a bit to pull it over a line (for instance, from $795 to $825) to see if that changes the nature of interested renters.And the phone number isn't my personal cell #, it's a Google voice number that will play a message, accept texts, and forward all texts and calls to my email.

I didn't use any partners - wanted to my first deal on my own before anyone else's money was in play, but to each their own.