i found this quite common when were worked in the uk , with the bigger houses , they drop off full time high paying work and dont have the income to keep up with the cost of a massive house and all its out goings ,
the house may be paid for but over time the up keep goes down hill fast , we had alot of houses where they didnt get painted every two years , drives stopped getting cleaned every year ect ect and after 15 years it starts looking tried and worn which is ashame
then they wait to long to sell it and get a good few quid less then they should all because of the memories then some young high flyer buys it the this is all repeated in 20 years times when they retire