The rate that you pay to process a credit card transaction is a combination of base costs and markups called merchant discount. Think of merchant discount as the retail price of credit card processing, base costs as raw material expenses and the markup as production costs.
I divided the rehab cost by the square footage and came up with a cost per square foot for each home. The rehab ranged from 7-15 dollars per sqft for an average of $12 per sqft. For example a 1000 sqft home should cost around $12,000 on average to do a cosmetic rehab.
If you are doing a tear down and building new construction my builders have told me they are usually in the 110-150$/sq foot price range. I just did a rehab in the 20002 area and although it was only about 600 square feet it was a complete renovation and cost about 40K.