My wife and I are the owners in the Articles of Incorporation and I am the registered agent. 

Also we are aging and not feeling great physically working on houses.

Maybe I should read a little closer, but if you aren't physically doing the work, why wouldn't you just let their construction company do the work if they are still going to split 50/50, (unless of course they charge too much, compare their price to your GC's estimate).

Lenders are now recognizing ADUs more accurately, especially as national programs like Fannie Mae and Freddie Mac incorporate them into their guidelines.

5+ units DSCR or commercial mortgages. each one is used for different things. really matters purchase price. location of property and your physical location. dscr looks at the property and your credit score. commercial bank looks at you and the property. tax returns, w2s DTI. then the property needs to cash flow enough for them. dscr is a bit more lax but higher rate.

These include (but are not limited to);a. a drop dead date for her to refinance and take you off the mortgage (5 years, whatever);b. trigger events for her to refinance regardless of date (birth of child, remarriage, failure to maintain the house physically, cease using house as primary residence, failure to pay insurance or property taxes, no "subject to" sales and etc., etc).and no doubt a host of other things.Then there's your remedy if she fails to keep her end of the bargain, including who gets appreciation, right to possess or maintain, etc.Your credit score is far down the list of concerns

Once reviewed, try to subtract 1 task that hasn't gotten too much traction and incorporate another new task that will help you get there.

If you purchase a tax lien certificate and the property is vacant, do you have any right to rent it or only to physically secure it?

It can be physically demanding and as I age I know that I’m not gonna do this for another 20 years!

Getting started with virtual wholesaling can be a lucrative way to break into real estate investing without needing to be physically present in the market you're targeting.