over the period of time , we have observed that Individuals or entity get paid finders fee / consulting fee specially on commercial transactions .I would like some feedback.

I then assigned and sold the contract for $2.9 million and made a $100,000 assignment fee.

Buyer put down $125k plus $40k assignment fee for the 9 houses.

In the event of default/non-performance on a CFD for vacant land in one of the hypothetical "foreclosure" states I mention above, does the land parcel have to go to auction, with bidding starting at the unpaid principle balance of the contract (plus late fees, legal fees, etc.)?

Even after that time passes it depends on the state what actions you may take but in my state for a relatively modest fee you simply have a constable post a notice and physically remove them 10 days later.

The mountain life pulled us to Spokane and we could not be happier!

Also, I wanted the license to be able to pull my own building permits and do my own projects. 

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Just pull the same comps in that area that have sold across the street from 2-4 units with the price and finishes you will put in..

For the location we would get a flat fee and a guarantee for booking for all rooms in the place.