Can the fees be covered instead by whatever money is acquired, in whatever fashion, for the rehab costs?

May not be the case, it may just be good old fashioned trespassing.

Examples:Seller wants all cash now-$150k in equity identified in your example-Offer $75k for the $150k identified - SimpleSeller wants part cash now and will finance part of the equity identified (Your likely scenario)-$150k in equity identified-Seller needs $20k to move to next residence-You could double the $20k they need to say it is worth $40k in equity-This leaves an offer to pay $130k total for their equity, of which $20k is in cash and $110k the seller finances in some fashion-This would leave open the discussion of how to finance the remaining $110k.  

I think that could almost appear predatory if you're selling lots of land in this fashion without an attorney. 

It is highly likely that you can find someone you can relate to in that fashion!

Hey Scott - I dunno... call me old-fashioned, but I just am not a fan of the short sale / foreclosure approach.The house was renting for $795.

That agent is not serving the seller well by responding to any potential buyer in that fashion, even if you offered $80K.  

Ok, they mail to PO Box the good old fashioned way and do not get reminders.  

You loan them money, secured by the property, and get a monthly interest payment and, hopefully, your principal returned in some fashion.  

What is accurate will be a highly regional question, I'd suggest chatting with a lender local to where you are buying.The reason expressing it as a % is never accurate is because the closing costs do not scale up and down in a linear fashion with purchase price.