Current P&I payment is ~$2315/month.If I wanted to, I could pay an additional ~1100/month and pay off the whole balance by 9/2031.

An extra $20 tip goes a long way and they remember that when they come across a house that might be a good deal later on.As for paying for leads, I feel like that is counter productive.

The goal is reliable performance, not premium finishes that tenants don’t pay extra for.This rehab philosophy is simple:Durable.

we have and results have not been great. get what you pay for. 

I'd go ahead and issue a 3-day notice to pay or quit.

In Cleveland SFH can charge tenants all utilities, trash is included with taxes so no extra bill here.   3. 

You could not evict for lease violation or not paying.  

The math does not support paying off a mortgage earley as @Theresa Harris explained.If you grandfather had bought a house in 1960 brand new for $15,000 would you have wanted him to pay that off faster or to take the extra money and buy some CocaCola shares for you?

It's a no brainer IMO, don't pay them off, don't even pay extra principal.

Pay tax on the new units that I sell and keep  the $250K exclusion for the original house (but now the lot is smaller?)?