It appears these investors merely provided unsecured loans to RAD who in turn purportedly made loans, although its unclear if that ever happened.

For the additional features we need that STR apps don't provide, we do the following.esignatures.io for lease signingKeyCheck for background checksOtherwise everything I need is covered by Hostfully, Breezeway, VR Platform, and a few other apps

Whether the seller was open to a buyer commission or not, I wouldn't put an additional cost into any personal purchase.  

The idea would involve working together to construct a road that provides access to my property.From there, I’m considering developing a 16-unit multifamily project on my land.

This is due to bonus depreciation which allows taxpayers to deduct 40% of qualifying property costs in the first year, in addition to regular depreciation for new construction and improvement.

Additionally, confirm the transfer won’t lead to property reassessment, which could increase taxes.

These are professionals with additional training and a stricter code of ethics.

In my market, we're seeing a shift from a pre-agreed upon % to provide to a buyer agent to sellers offering buyer agent compensation but leaving it up to the buyer to request how much. 

Based on the numbers you provided, these are well above the debt service coverage ratio of 1.25 hence from a lenders perspective, this is loanable.

Additionally, please share if this was a scam or not.