Other than the one site you mentioned that addressed liquidity via a capital raise are there other crowd funding sites that successfully overcame this barrier. 

I can shoot you addresses and offer prices, and you can email me offer contracts, I sign, send it back and we can do 20+ deals in 1-2 years ;-)

PM me your email address & I'll send them to you. 

These risks must be addressed before you proceed & I suggest you consult a good real estate attorney to help you structure the deal.Dodd-Frank rules probably won't apply if you don't more than the minimum number of seller financed transactions each year.  

You will do yourself a huge disservice, if you don't factor in reserves for normal maintenance & repairs, CapEx and vacancy.You don't have to give an exact address, but what general area is the property in?

Use zillow to get the comps you need to come up with your own estimate.To me, I have a pretty simplistic approach to estimating.In Zillow, I enter the address of my home and click submit.I then modify the default filters based on my subject property's key characteristics: Bedroom count, square footage and age of home. 

I'd be happy to share the address. 

They claim the big issue is that the apartment does not have its own legal address and is not listed in the property appraiser records in my county. 

When you are working your numbers do not forget to add in the cost of flood insurance.Go to https://msc.fema.gov/portal to get the current flood map for the address you are interested in.

Go to the county appraisal district website and do a search there by address.