Failed to disclose basement flooding

[Will R.]

Help! Purchased a home last April. This year we've experienced alot of rain fall and the basement flooded. After having the basement looked at i was told that it didnt look like it was the first time this had happened. Nails on drywall were rusted and after pulling some down you could see discoloration in the cement. Looking at the disclosure theres a statement stating due to seller obtaining prorperty from a foreclosure they are not required to disclose and purchaser accepts deal as is. None of that was highlighted by my realtor when we were looking at the property or closing on the deal. I called the county property appraiser and they stated that they didnt have any records of the property showing it had been foreclosed on. We had a home inspector that was recommended by my realtor who didnt find or tell us there was anything to be concerned about. The sellers agent was with the same realtor company as my agent. I feel they pulled a fast one on us and would like some input on my what actions i should take ... when it first flooded and had an inspector look at the foundation they could see some inward bowing on the foundation in two areas and quoted me $20-30k to excavate and reseal the foundation. They also mentioned that there is the possibility of mold since this wasnt the first time. If i hire a real estate lawyer how much should i expect it to cost? What kind of outcome would i be looking for? Is it worth it to hire a lawyer? How long could the process take? Any insight u may have would be great. Thank you