If a sponsor resists this basic transparency measure, consider it a serious warning sign.  

When your rental income is 1.5-2x the mortgage payment - as is typical for highly refined STR strategies - they're basically not concerned about the mortgage payment.

While you can't use any overage to help your income, you can offset (if the rents are enough) for a 1:1 and basically have no add to the income. 

@Nathan Gesner  is on point yet again, start with your basic estate plan first just like he did. 

Can you arrange for counters, floors, painting other “basics” without him tacking on his 20%?

Most will require basic documentation such as a complete loan application, ID, Entity Docs, and 3rd party contact information.

I am training our son to basically do the rehabs but there is a learning curve.  

Typically, you can only do one rollover per 12-month period (again, IRS Publication 969 has the details).In the end, having the option to invest your HSA funds is usually a better bet than letting them sit in a basic savings account.

@Allison Cutlip believe BP has leases for all 50 states and recommends RentRedi software.NOTE: the leases are very basic and short.

According to Warren Buffet, Fannie and Freddie really failed because of high-leverage risk-taking in the fixed income arbitrage space, saying:“The portfolios are what really got them into the trouble…the managements of Freddie and Fannie tried to juice up the earnings, basically, because the insurance guaranteed that they were given that mortgage.