Though DSCR gives you a better picture of how the property is projected to perform vs debt service, you can't rely solely on one measure to make a purchase decision. 

But let’s go a later deeper - my down payment would come out of a well performing stock portfolio.

Theoretically you could sue them performance. 

The price should reflect the current performance, not the seller’s expectations for the future.Seller financing is a big plus.

Do not rely on your subcontractors to know/perform the code correctly for your area.

The bank will put a hold on them, so you can't just draw them out, so don't plan to need them for a while.This will cost you an appraisal on both properties to be performed by that lender. 

Your name and credit would stay with the existing note, which you would keep paying on - ideally yourself with money you receive from the "buyer", because if they don't pay your credit is wrecked and your house is in foreclosure.If you search on here you'll see everyone and their brother looking to do Subto and it's a nightmare unless the buyer has the funds to pay the note off if/when the original lender figures out you don't occupy the property any more and are attempting to do what you want to do, since most loans are going to specify that performance.  

I had a unique perspective of how these two industries working together.While performing an inspection on a house, I got to chat with the seller and found he was a commercial construction superintendent for a large local company.

Some packages genuinely improve property performance, while others might feel excessive.

To see how much a 1031 exchange will benefit you in a sale you must first calculate the performance of your current property.