As long as you have legitimate self-employment activity (which you do as a real estate agent) and don't have full time employees working for you - then you are eligible for Solo 401k. 

I won't lie, it can be frustrating at times to work together and be together especially running 2 companies with 30+ employees, in a very competitive field, having/trying to be the best nationwide at what we do, getting known for it, dealing with 300+ clients...We compliment each other and we cancel each other out.

He provides housing to employees who don't have housing, and they do a lot out of town work.

W2 payroll is for the non-owner employees or for corporate shareholders, both S-corp and C-corp.

First time going through an IPO (AFRM). Looking for any advice/strategies for:• deferring/optimizing cap gains tax• finding the right CPA (well versed in pre ipo options, RSUs, multi state residency during tenure, etc...

Now I understand, but....Would I have to be shown as an employee of my own LLC? 

May you harness the power of the Dracul and be victorious!

They are very large and all of their employees are investors as well.

I plan on getting a single family and renting to short term employees near my W2, unless I find a multi-family, in which I would still rent by the room but the other unit would be a standard rental.I look forward to comments, advice and constructive criticism, thank you!

Just doing some research it looks like we could, as a married couple, classify as a sole proprietor or one of us can and the other could be an 'employee".