Big concern is how its stored, remember a guy who stored his car for 3 years and left it without proper coolant in it, 3 winters later goes on dyno for mapping, heater matrix is ruptured (not a cheap or easy job) which pee's water all over the interior, that's fixed and then found the headgasket has gone due to the ice splinting pipes lifting the heads.
Forresters are hardy beasts, but not gonna be cheap to get back on the road at all, gonna need a full service, prob a set of tyres at least which wont give you much change from £1500. Add in other rubber items that don;t like being stood and its asking for trouble.
Can't see it being viable myself