Mold Issue - Should we sell or hold?

[Kevin Kim]

I have purchased half duplex in Connecticut a year ago (home price seems to be up 10% since i purchased). This house was very nice and clean (build later 1980) My tenant recently claimed there is mold on 1fl (it is like basement as there is no window, it is next to garage) When i see, the mold is not only one area but it seems widely spread on the ground floor (laundry room, wall, celiling etc) Since it is OOO investment, it is not easy to deal with mold issue. This home has little cash flow and I was thinking i will hold long term but i am thinking if i should sell (will buy some Multifamily If i decided to sell with some extra cash) home this home or keep it. I have currently installed dehumidifier and monitoring the status. Since this is the first time to deal with mold, I would appreciate if anyone can share some input.