Off street parking

In the process of refinancing for cash out. Fannie mae has the best offer: 30yr amort, 10 yr term, 4.45%, etc. However, the only hurdle seems to be our park has no off-street parking spots and they want an “escrow hold back” so they will keep 125% of the cost or estimate until completed which should happen no more than 3 months post closing. #1 Anyone gone thru this experience and can you elaborate on the process? and #2 what’s is the best or most economical option to add parking pads that will fulfill Fannie mae requirements?