Should a gut have to pencil as a rental before you buy it?
Every underwriting model I build for a heavy rehab now has a second tab on it, and I want to know if that's normal or if I'm adding work for nothing.
Tab one is the flip. Purchase, rehab, carry, selling cost, out the door at ARV. Standard stuff, 70 rule as the sanity check.
Tab two asks a different question. If the resale market goes quiet the month I finish, can I refinance into a long term loan and rent the house at a payment I can actually cover? That means I need an appraisal high enough to pull most of my cash back at whatever the lender's loan to value is, and I need a rent that clears the new payment plus taxes, insurance and a reserve. Confirm the refi terms with your lender before you rely on them, because they change.
The case for requiring tab two: a gut takes four to six months minimum, so you're underwriting into a market you can't see. Having a hold that works turns a bad resale market from a loss into a delay.
The case against: if you insist that every gut also works as a rental, you'll reject a lot of deals. High ARV neighborhoods are exactly where guts create the most value and exactly where rent to price is worst. A 455 finished house renting for 2,800 doesn't cover much of anything, and requiring it to means you only ever buy in cheaper areas where the rehab math is tighter anyway.
So it's a real constraint with a real cost. Where do people actually draw it?
Does a full gut have to also work as a rental hold before you'll buy it?
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