Most rehab lender will do 65 to 80 ARV( After Repair Value)
Here is the calculation:
Offer= (ARV x 72%) - ( Repairs + Holding + Closing cost )
Note: if you want low closing or no closing cost will require higher rate.
530,000( ARV) X 72%= 381,600 is enough to buy $380,000 short sale but not enough to do repair of 38,000. ( see below) That 38,000 down is your repair.
10,000+18,000( example: 386,000@ 10% = 38,600 divide by 12 months. Hold for 6 months $3216 IO X 6 months =$ 19,299) +Closing cost $10,000 = 38,0000
What if the property sit longer. Where is your reserve to cover your ass.
381,600 - 38,000 (10,000+18,000+ 10,000) = 343,600 Offer
Some lender max at 80% due to borrower cash. If you had gotten a higher % of ARV, you would not have to put the cash.That is leverage. the 38,000 I would keep just as emergency to cover my ass if the property will not move. Pad the repair alittle.You pull the wall, sudddenly you have water damage behind the wall.
530,000 -418,000( 380,000 to buy short sale + 38,000- Repairs ) = $112,000 profit
Do a cost approach analysis. Hook up with a contractor. Tell them you are an investor . Need to fix house that you are going to buy. Ask can I call you and descibe the situation. Takes pictures. Get 3 estimates. You get ballpark. In SS this is what you call structure bid.