I bought a 2011 forester runs well - but...
90 and 120k maintenance will most likely be needed which can cost $$ depending on your abilities: the usual filters and fluids, tranny fluid, gear oil, PCV valve (generally overlooked), etc. - plus spark plugs and maybe a fuel filter change which maybe smarter to just by the whole assembly (pump and filter as a unit).
As far as oil consumption extended warranty, SOA is strict at 8 years or 100K miles (whichever comes first). I bought my vehicle at 110K and discovered I was burning 1qt per 1200 miles. SOA would provide no love (and this was my 3rd Subaru - 2 used and 1 new). I'm going to try the Valvoline 0w20 MaxLife high mileage oil to see if that tames it.
Regardless the vehicle runs great and interior seems to wear well. In fact, I installed a tranny cooler and towed a 2000 lbs. teardrop travel trailer from Ohio to Florida (round-trip) with no problems (avg 15.6 MPG while towing on that trip).
My MPG (not towing) is 26.7 highway and 23/24 in the city.
Good luck!