This often led to conflicts (you can go to youtube or google to see how it goes).So as you already invested and are getting paid (and I really agree in the part you say that is reliable and honest people that live there because they have no option) I would recommend you to be extra careful and keep track of this first investment and the local situation before jumping in other deals.These are just my thoughts and the most important: If I can help you in any way (Legal or non-legal question) just let me know.     

The retirement plan will track each separately, so no need to worry about muddying the waters there.  

I'm so adamant about investing from a position of financial strength that I wrote a book about it, and host a podcast every week where we talk about nothing but building a rock solid financial foundation capable of supporting financial freedom and large-scale real estate investments. 

If my kitchen is on fire don’t waste 5 minutes tracking me down when the fire department could be halfway there already.

It's all about your relationships, experience, track record or that of your partners and sponsors and the property itself.Raising big capital, like $20, $50 and $100 million raises is an art and a business.

We used Waveapps.com to track the liens which is a great platform.

But B is far from there and really on the edge with the tracks and Erie Ave. 

Just made sure to track the payback with the cashflow from the investment and the arbitrage.

As such, your portfolio of rental homes would not be considered a business capable of sponsoring a Solo 401(k) plan, nor would it make sense to attempt to re-configure a rental business to accomplish this goal.  

However, I still have players in the game and am still on track to close some multifamily and other commercial bridge deals.