Solo 401k is Employer Sponsored plan and requires to have a legitimate self-employment activity or small business w/o full time employees. 

The more of the following you are able to provide, the higher a price you can request:Inspection report by licensed inspector, legitimate sold comps within 0.1 mile range, roof warranty from licensed roofer, permits for the work performed, disclosure of how much electric/plumbing/HVAC was replaced, warranty for the heater (if new) or disclosure of what service was performed, age of windows and grade of windows (if new), warranty on appliances (if new), last service on appliances (if used), grade/brand/color/installation date of cosmetic materials (flooring, paint, etc.), etc.If tenant in place: strong lease terms, proof of payment history, screening criteria including personality screen, security deposit & last month rent held, annual lease term, etc.  

Have spent some time reading the posts about self-directed 401Ks -- I had no idea about this structure until I joined BP!

I'm not looking for properties but for projects to join.

What possible (legitimate) objection could they have?...

I'm thrilled to be joining this forum.  

You need to join a few REIAs?  

Osazee,I saw that you just recently joined EBRHA.

my question is, if I make an offer, am I legally bound in any way yet or do I legitimately have the escrow period to back out?

I loved all of the BP podcasts on youtube so I decided to join.