Now that said, there is nuggets to be picked up, that with time and compiling it all, can help a person out.

To create a Checkbook IRA you will need a facilitator company (Brian, myself and few other contributors here on the forum can help you, do your due diligence)  Investment property can be financed in an IRA, you must use non-recourse loan, there is a handful of lenders who specifically offer this kind of loans, here is a list that I compiled, hope you'll find it helpful:   https://www.biggerpockets.com/blogs/2810/50272-lis...Using leverage will result in UBIT on portion of the income of the IRA, not a deal breaker, but you must be aware of thisSelf-directed Solo 401k is exempt from UBIT on leveraged real estate, consider this option if you are eligible LLC inside of an IRA + Trust seems too complicated, keep things simple if possible 

While consulting with a CPA is the suitable choice, I recommend compiling a comprehensive list of all your questions and finding a CPA with proven experience in small business and real estate.Based on my extensive experience, having been in similar situations multiple times, I've learned that the effectiveness of a CPA depends on the quality of the question I asked.

You've been a busy man and compiled an impressive resume!

Brandon Turner compiled a list of 21 best investing books for real estate investors.

Compile a list of local agents and start making some calls.

They say their reports "which are hand-compiled from our FCRA Certified Screeners." are different from transunion.

South, Memphis, Houston, Allen Rock West: Modesto, San Diego, Riverside To OP, once you have this data, just compile which one that has the lousiest cap rate, and buy the land in the first two cities.Ten years from now you will thank me LOL

The lists are usually compiled through the licensing data and not all have an email on those files.

@Patrick M. 1) I second what @Theo Hicks said about contacting brokers. 2) Also, you may want to have a real estate friendly residential realtor contact as sometimes small commercial multi's spill over to residential MLS or the realtors may have contact on the other side. 3) In addition to that, you can use such sites as ListSource to compile your own list of owners with small MFH's and start direct marketing campaign. 4) Find local apartment owners associations and join them, as well as local MFH REI clubs on meetup and BP.