There is a company called Ram Jack I think they are a national outfit. They will come and look and give you a price for free. I not sure if they will if you are not the owner. You are looking $10,000 to $20,000 so get it checked before you buy.
That seems very high priced just to lift a corner of a sun room, but it wouldnt surprise me. I was just going to ask opinions on what something like this may cost.