Brrrr-Ing building... undisclosed foundation will wreck deal

[Nathan Adams]

I bought a building, remodeled interior of building and got the rents up.... Then refinanced. I am using that money to do siding and roofing. Recently it was discovered there is a substantial horizontal crack in the foundation, which began leaking during a rainstorm into the basement unit. The quotes I’m getting for the foundation are extraordinarily high.  I wanted to get some experienced opinions about fixing foundation leaks.