Not really a formal presentation per se, but answer all the questions.  

Hello,My name is Aaron, my brother & I have been renovating my Grandma’s house and are now at the point of Sale.Days before, a homeless man set up shop a few houses up from ours.Setting: Neighborhood In SE, DC.

I’m interested in learning if my REI income (Sch E) could be shielded by contributing to a Solo 401k - or if I them open myself up to SE Tax; or if I should just focus on my Sch C RE agent income to make those contributions.

If I had partners and was paying for a service to a 3rd party anyway, avoiding SE taxes wouldn't be my focus so I would probably try to do it.  

This type of income could be considered self-employment income, in which case moving it to an LLC which pays you a reasonable salary could reduce payroll/SE tax.

My name is Reed, I am 19 from SE Wisconsin.

It wasn't the landlord that messed up per se. 

this came out today https://www.kxan.com/news/loca...I reviewed a podcast from a dude who was interviewing a bunch of real estate brokers in Austin and a statement was Del Valle and SE Austin will never become a 500K + community......while all this development is good I always believed demographics and high income drive real estate prices ..

The new salary would be subject to the 15.3% SE tax.

(my area SE PA is seeing very high prices right now).Should I just pull the $40,000 out of my primary to pay off property #1?