The drivers were, potential appreciation, A+ location and a place to give my kids once they grow up.

Also your debt pay down is much more significant with a 300k property.Like I said you are on the right track; you have just discovered that there is no free lunch in real estate either; but it's still an increadible vehicle to change the trajectory of your life!

I’m trying to build wealth and the TSP is not the best vehicle for wealth building.

Thats about the same as a cement mixer driver , or a heating oil truck driver 

It's generally not too business friendly and I just don't see many drivers of growth or demographic/employment trends running in its favor, compared to other parts of the country.I do think if you're already here in RI, for whatever reason, you can do OK in real estate.

They sold in an average of 24 days on market and at an average of 103% of asking price - and right now, there are only TWO MFR's listed in Waltham.Buyers are NOT in the driver's seat around here.

RE seems like such an amazing vehicle that can be used to make the life a person desires.

My wife and i live in a moderately nice home and drive good reliable vehicles. 

Shareholders would get 33% of income/losses and distributions.another example is if an S-corp is owned 90%, 5% and 5% the shareholders would get 90%, 5% and 5% of income/losses and distributions.On the other hand - Partnership vehicles are more flexible and can say a partner who owns 100% of the capital would only get 50% of the income.Also multi-member LLC's would require the filing of a form 1065(partnership return) where the partnership would then distribute a K-1 to each partner/member which they would then report on their individual tax return.Conversely, an S-corp would require the filing of a form 1120S(S-Corp tax return) where the corporation would then distribute a K-1 to each shareholder which they would then report on their individual tax return.A flip that took more than 1 year would still be taxed as ordinary income.

Be careful to parse marketing hype from reality.Autonomous driving vehicles will have a huge impact on real estate, but not until the manufacturers, government, and insurance companies all agree on how it will work.