Buying a property for say, $70,000, and putting another $100,000 of rehab capital into should not be a problem as long as (a) your comps support a high-enough ARV, and (b) you are bringing enough equity to the deal.

I can't help with your current problem as I'm not a lawyer.

They have no concept of actually waiting throughout the weekend to have a repair addressed once the temperature goes over a certain limit.We often go over, pretend to fiddle with the unit and can sometimes diagnose the problem as a frozen unit, especially if the box of 12 filters I've left for them at move in have grown dusty with cobwebs still sitting in the closet untouched and the one being used looks like it's grown a nice beard. 

The problem as you might image, is that it is hard to find a SFR to put under contract until I know the closing date on my first property sale.I would appreciate any thoughts in how to work earlier on finding and contracting on the SFR replacement property.

That's not a problem.  As

Helps to make friends with the neighbors so that they can advise you if they see a problem as well.

The purchase price to rental income ratio looks good (1.5%).As far a Seller staying I don't see a problem as long as they are treated as a tenant contractually.  

A short holding is not necessarily a problem as long as you can demonstrate that you have the intent to hold for rental, investment or business use.Yes, you can absolutely sell a duplex and 1031 Exchange into any other kind of real estate as long as it is also held for rental, investment or business use.

Hello fellow realtors,I have problem, a good one...

John Frank, when you move is not your problem, as long as they pay for the full months of rent.