What bad luck, maybe the Homestay team aren't carrying out the necessary checks (which isn't difficult is it?). I hope you find somewhere suitable for future IoM visits. I found a Homestay for my wife and daughter to stay in 2013 while I was  based in the paddock competing in the Classic TT. I'm not competing at the moment but we're still making the annual pilgrimage for the Classic TT/MGP as marshals and it's great. Good people, good accommodation, good location it really is a home from home. They also introduced me to the Parish Walk and we're now regular June visitors, I take part in the walk and my wife's my support crew.