Help with estimating repair cost

[Nancy Y.]

Hi everyone,

Super newbie here.

I'm currently under contract for my first property investment. It's a 1958 duplex. After home inspections there were alot of issues that were found! it has crawlspace issues, retaining wall issues, and roof issues with visible water stains on walls and ceilings in multiple rooms. The seller is estimating 7k to repair everything and willing to do a repair escrow of 7k. But my estimates seems to be way higher than his.  I've attached photos of the problems. What would you guys estimate repair cost to be by licenced professional? Or would you back out of deal if they are not willing to put more in repair escrow?

Any advice is appreciated! Thank you.