I buy a box of bolts or some tools, or buy an extra stove or fridge at a yard sale what entity do I put it in? 

The problem is that you don't get an opportunity to do an inspection before you buy.If you buy pre-sale from the owner, you have arrears to bring current, getting the owner to move after you have solved their problem and taken the pressure off, along with the previously listed concerns.

It will depend on where you are doing your deals and what the liability is that follows you after a sale.

And other questionsIf I was reviewing this for one of the investors that buys SubTo deals from me, I'd want to renegotiate the down, remove the balloon, make sure my investor has 6 months of payments in reserves, make sure my investor can qualify for a refinance in the even the Due on Sale got called.I would need more answers to know if I would do the deal. 

They’ll have a strong network and be more in tune with the opportunities available in the rental market, whether you're interested in single-family homes or multi-unit buildings.If you're focusing on single-family homes, try to keep them within the same area.

The situation allows for an excellent opportunity to work with a property manager and build trust.I am looking to gradually build and scale my real estate portfolio in Atlanta by purchasing one property each year.

If not then sale.  

The key is that in order to completely defer all tax you must purchase at least as much as your net sale. 

Considering opportunity cost of not affording more rentals vs paying much more in interest.

We have an opportunity coming up from a family member who is willing to sell us my childhood home for what they got it for (240k) and the comps in that neighborhood are 600k+.