Not really sure why everyone seems to think Evos are expensive.....do some research, you'll see the price has come down dramatically over the years. More so if you are in fact going after an VIII and not a IX or X.

Maintenance is relatively inexpensive. Like someone already mentioned, keep the fluids changed and follow the scheduled maintenace checkups and you'll be fine.

My vote is go for it. There's only a hand full of cars out there that respond to modifications the way the Evo does. And even if you plan on staying stock, it's already a very capable machine as it sits.