FMX---Last year I had an electrician come and install one 220 volt outlet in my garage, about 25 foot of cable, and tapped into my 200 Amp service, which fortunately had one open rack left to add the required breaker to. That cost $250. For what you want, especially if a second box has to be added to your 200 amp box, you will easily be over $1000----if you do it yourself and don't have it approved and inspected by the Hydro service provider, then your fire insurance won't cover anything if your house/garage burn down.