Essentially you have no recourse.

In addition there are a host of other tax benefits and deductions which you would be entitled to claim depending on your income.

Its valuable experience in renovations, landlording, and provides some great benefits (like offsetting your mortgage).There is nothing like empirical knowledge, so get out there and try. 

On my end, probably >70% of the time veterans receiving disability benefits, and single women receiving alimony or child support, who are applying for a mortgage, will not tell me about those income sources unless I specifically ask.

You essentially described scenario A with a different set of numbers.

The other hidden benefit of owner financing is it doesn't show up on your credit report so doesn't count against you for things like credit score and dscr.

Travel for business development/sales $10K/yr.Would love your 2 cents on how I should assign the expenses (e.g. which companies should pay them) as they all benefit each business and assigning expenses to certain businesses would affect partner Kevin differently?

https://www.amazon.com/Paper-Profits-Beginners-essentials-mortgage-ebook/dp/B06Y4C7X6Y/ https://www.pprnoteco.com/wp-content/uploads/2016/08/Intro_to_Note_Investing.pdf Finally, check out NoteMogul which has a very reasonably priced intro course to note investing: https://ecourse.notemogul.com/training?

I'm essentially doing this now and have an in-law suite that I AirBnB for greater than a normal rent in my neighborhood.You should analyze the property and see what your PITI would be with 3.5% down and what you can realistically get for rent in the other unit(s).  

Right now, I would characterize myself in the accumulation phase, as I am essentially stock piling cash to be able to put down the down payment and have plenty left over to account for any unforeseen expenses (repairs, vacancy, etc.).My question is, where should I be keeping this cash?