If your pay is dependent on the property closing you are acting as an agent brokering real estate between two parties.  

That strategy is the more dependent on the current market conditions (specifically interest rate).

I would say light rehab $30-$40/sqft - Moderate rehab $40-$60/sqft - Heavy rehab - $60-$100/sqft depending on what is needed

It really depends on what your goal is.

A better approach might be to find a REI Association in the area(s) and ask other investors for their recommendations - it's not uncommon to choose a different appraiser depending on the type of property (residential vs commercial MFH vs. office or industrial) and the objective of the appraisal.

Example if a house is forclosured on $350,000 but the value of the property  has a potential  of $800,000 to $900,000 depending on comps the the property would start the Auction sell not on what's delinquent but at 67% of value.

So are you saying it may not be wise to refinance after the forced appreciation, or does it just depend on the interest rates?

Depends on the points value of your timeshare unit.  

Depends on the broker.

Takes an investment of $50k + depending on market.