Have you investigated the ability to withdraw from a trad IRA without the 10% penalty due to the CARES act? 

If the borrower lacks the documented ability to service the debt, they may be able to be considered for a short sale that meets the lender's minimum net proceeds requirements. 

Should title of property purchased cash go in one or both names to limit liability and also to optimize our ability to qualify for lending in future using the cashflow?

The ability to pump paint directly out of the 1 or 5 gallon bucket saves a lot of time doing larger jobs.

So unless your all CASH  you maybe sitting there looking at deals with no ability to buy them.. thats what happened 08 to 2011 to 2012.. you could not get an investor loan to save your life..  

.* Explore the commercial properties route - where they look more at your downpayment + ability of the property to service the debt, rather than your W2.* Do the house under your wife's name (if she still has a W2)The first 2 options will either mean high rates or high amount of funds down.

IF you don't have the time/patience/ability to do that, hire an attorney.

I like the forced appreciation and the ability to hold the property after the rehab is complete.

As it relates to lot rent vs park owned, the beauty of mobile home parks as an investment, is their ability to deliver predictable cash flow, regardless of what chaos is going on around us. 

It covers what I believe is the most essential element of real estate investing and that's mindset.