They always conduct their own due diligence to ensure everything is accurate and we usually have an in-depth dialogue with them regarding the financials prior to filing. 

None of what I said here really can qualify as advice as I have not seen any of the specifics of your tax situation but you really need a strategist to get in there and (1) help determine if REPS is even the right path for you or if there are better strategies available to you, (2) help provide taxable income projections so that you understand your tax liability given varying scenarios, and (3) help you conduct the strategy so that you are "audit ready" in the event that you are audited in the future.

We would need more facts to conduct a proper post-mortem on this to share any insight.

You fix your places up extra nice to try to lure the higher score value shoppers into your property.

We self manage our rental property and was wondering if there is an inspection service that helps conduct quarterly inspection of the property?

A buyer may have an obligation to conduct reasonable due diligence and explore any indicia that his seller may not have title to the property, including exclusive possession.  

As an investors you should focus on properties with desirable features, conduct comprehensive market analysis, and consider utilizing professional property management services to maximize your chances of success.

Don't forget you need the original developer's permission to conduct structural changes to the villa inside and out.

For the turn Key program, Dmitri insisted that I would need to pay an up front fee of 10K per property that I intended to purchase through their program before they'd ever send me deals upon which I could conduct my due diligence. 

There are ways to greatly mitigate this stress by conducting thorough diligence on properties and those you do business with.