House 3K short of appraisal because garage wont be built by close

[Adam Craig]

We listed a property at 137K. After we had the final city inspections it was determined that we needed to build a new garage because our fixes were not sufficient. So we let buyers know a brand new garage is being constructed.

Right after that we got a full price offer with a 2 week close because their home was selling and they were living out of a hotel. I told the buyers the garage might not be ready in time but we would escrow funds and write it in the contract.

We tore the old garage down and pored the pad. The builder wont be ready for 12 days....We are 5 days from close and the lender appraised the house for 134K  (3K shy of contract price) because he had to appraise it with no garage.

What are my options in order to get this deal done without walking away from 3K? The buyer needs to move in next week so I dont want to delay closing