While they may be doing alot of surveys or tenants and cold calling I have never had any verification of this in my time here in okc and have never, ever received a call from them on the pricing of our rentals. 

@Sean Boon go take a look at the property and survey the area before making a decision.

I could also use someone to do a survey/mortgage loan inspection on this particular property.Finally, I could use some investment savvy agents both on the residential side and the light commercial side to run my deals through and get some opinions of value before we purchase.  

What is the occupancy in that sub-market and what does your market survey say about the other comp properties?

Some of the things that have transpired to this point:1) Surveying of the property has already been done, however the site still needs to be cleared and prepared  for development.2) Property has already been zoned for R4 (high density residential)3) Sewage/ Potable water to the site is already prepared for multi-unit development.4) Blueprints have already been developed and reviewed by one of the top developers in the area.5) Investor is primed and ready to see a proposal of all costs (where I come in at).6) Owner is a contractor and wants to reserve some subcontracting roles for himself.Some of the things that I am struggling with up to point is how do I come up with the figures to bring to the investor?

After each closing, we do a post  closing survey to see how we did and how the individuals we recommend did. 

Verify if it’s on city water/sewer, if it has any liens against it, of the phase 1 environmental survey comes back ok, how the utilities are, if the profit and loss statements are accurate, and anything else that the park has.  

i just feel like there is more to the commercial side with reviewing all the leases, property disclosures, surveys, inspections and so on that i might miss something for my fist couple deals of this size. 

As a broad rule of thumb closing costs usually range from 2-5% of purchase price and include things such as loan fees, discounted points, appraisal fees, title searches, title insurance, surveys, taxes, deed recording fees, credit report, etc.

We have to get an elevation survey first, then we submit that to the insurance company to determine the quote.