Mold at basement_ what's the risk/potential cost?

[Chelsea Zhou]

Hi guys, I'm very new to the RE, and starting off looking at the BRRR. This townhouse property is in city, with very enticing price (110k) and needs some rehab for rental, a foreclosure by the bank. I've checked the numbers and about 1.3% under 2% rule (rare in the area), rooms looked pretty decent, only some bugs around kitchen and raw basement. Coms is >200k as neighbors. I was going to give a FHA rehab loan for it, but was told by seller's agent there was a cash offer and was off the market. However it's back to the market after 2 weeks and agent said: the buyer walked away after the inspection: mold in the basement. I want to hear your suggestion as: how bad it could be? What's the risk I'm facing in such deal? And what's the best next step if want to assess the situation? Thanks very much.