I'm also interested in general knowledge of the multifamily development process(which loan vehicles may be best, which pitfalls to avoid, etc.).

My neighbor at a house I recently sold wanted me to cut down a tree that he felt was a danger to his property, conveniently after I called the cops on him for repeatedly parking in my driveway and refusing to move his vehicles... 

Hi, This is my first post so if it's answered elsewhere let me know.Is there a good reason to boot tenants vehicles with no warning for minor violations?

Ideally, you'd want to invest passively with your retirement account, couple examples will be owning a rental property or doing private lending.Based on the above it would be best to do the wholesaling outside of a tax-deferred vehicle, but use profits from this activity to contribute into truly self-directed Solo 401k.

Buy the best running vehicle you can.

Work overtime, 2nd job, 3rd investment vehicles, etc..   

I think, that while you may be right in your observation, there are more rational explanations...The reason, I would suspect, for the fundamental difference you are sensing goes back to the fundamental difference in the investment vehicle itself.

There aren't many investment vehicles in a TSP aside from the funds the few funds they have.Would it be possible or even legal (I know, seek professional legal advice yada yada) to continue contributing 5% (or more) into my TSP to take advantage of the "free money" being matched by the government and then roll the balance every year into a tax deferred SD-IRA so I can invest that money freely? 

In that case, you should sell the large home.You also indicate that you want to build wealth through real estate, which is probably the best wealth-building vehicle available to most people. 

I always say a good way to judge someone in trades is by the work vehicle they have.