@Marsha SegreeThe first question is whether your LLC qualifies to sponsor a Solo 401(k).  

I have read that to become licensed you must be sponsored by a broker.

If your goal is to sell houses and make a lot of money then find a broker willing to sponsor you.

@Igor GajicMy suggestion is in addition to learnings as @KimLisa Taylor suggests, I'd look into finding a sponsor (aka syndicator).

They get listing fees from sponsors and some get fees from investors.  

Demetrius,I believe that you will have to be "sponsored" by a Certified Appraiser then take about 90 hours of training.

@Matt R.https://www.kcet.org/shows/city-rising/city-rising... this is on KCET "public television" It's sponsored by CALIFORNIA ENDOWMENT who gets funding from California Governemnt CALIFORNIA ENDOWMENT gets $billions from the govenemrn then pours it into Tenantstogether.org So essentially our taxes are paying this organization who wants to increase government control of private property.... thus upping their control and paying government worker salary.

I went on to a cite sponsored by tax practitioners (paid prepares, tax focused cpa's and tax attorneys) and even with them this exact same question gets about 50% on one side and 50% on the other. 

They do not accept all sponsors.

Probably a 25yr amortization, variable rate around prime rate (depending on your well-heeled sponsor), fixed rate for a few years, 5, 10 or 15yr maturity, and prepayment penalties.