Do you want your son to bet the financial outcome of his 20s on this seller's ability to make good choices? 

The Chicago Association of Realtors'® specifically state "When you become a Dual Agent, you owe equal fiduciary duties at that point to both parties in the transaction, and you lose the ability to negotiate for, strategize and advise either one."

And a lot of old school GCs may not have the ability to take a CC and may not care to learn how to...Main question is: why do you want to do this?

Provide them proof of your ability to find, fix, flip (or whatever strategy you plan to use), and then start with small amounts of their money.

Other types of sellers that are making deals easier to get done are those with assumable debt available, and sellers with the ability to seller finance there properties.

If you are self-employed with no full-time employees you may wish to consider opening a Solo 401k instead of a self-directed IRA as it has several advantages over an IRA LLC such as much higher contribution limits, direct checkbook control (i.e. no need to have the account at a speciality trust company), ability to take a 401k loan, exclusion from unrelated debt finance income tax with respect to investment in real estate acquired with non-recourse financing, etc.Can I contribute to both a Solo 401k and SDIRA?

If a student doesn’t get the Charter School or neighborhood school of their choice, (which happens all the time), or the Charter School closes, they have the ability to enroll in their “neighborhood” school.

No qualifying and the ability to use your money to purchase something else?

As others noted, there is no limit to DSCR funding other than your ability to produce enough liquidity for down payments, closing costs, and the required reserves post-closing.

The ability to see the major issues before you buy is key especially when buying dilapidated early 1900's homes.