Never in a month of Sundays would I consider it. If it's had subsidence in the past, the survey would seem to indicate that those problems could recur in the future. That could be because either it never had underpinning to resolve the problem or, it did have underpinning and it's now showing signs of failure. The costs for pile driven underpinning are huge, invasive and noisy. The cost for not doing it are recurring damp problems, structural instability, difficulty in getting insurance and almost impossible to resell. If your daughter is adamant that she wants this particular property, I'd advise her to get a full structural survey (which is in itself expensive) to determine just how much it will cost to protect the property for the future and then ask for that amount to be deducted from the sale price. I'm surprised that a mortgage would be given on the property knowing what significant costs are involved in rectifying subsidence.