It has another interesting aspect that I will disclose later, if the deal goes thru closing. 

Giving false information or not disclosing pertinent facts in connection with a loan can be mortgage or bank fraud and you do not have to actually cause a financial loss, simply an attempt can give you a very hard time. 

Is there anything you have fixed in the past that might scare the buyers if you disclosed it now as a possible future problem?    

At least this will give you an idea of what type of deal you are doing.If the seller did not disclose he was selling a property under quit claim deed does not sound right.

@John Mathewson  in looking at website this is another in a long line of Aussie based marketing companies selling US investments to Aussies and other overseas buyers.now just a pet peeve for me personally is they don't disclose on the website who the principals are of the company...

You have no moral or ethical obligation to disclose any details. 

Name needs to be printed and signed.See if tenant discloses sales per the lease?

If that is the case, can I just get a Purchase & Sale Contract signed, disclose that I am marketing the property, say for 15-30 days?

Unless your parents are putting money into your account, your lender will require a lender's policy of title insurance and a loan will show on the HUD making your transaction not a cash transaction.Typically, if you disclose what you are doing, it's tough to go wrong.  

No, but you'd still have to disclose when applying for other financing.