Re: Running Electric to the Garage
To start with, if you are running BX you'll never get it through 3/4" conduit.
I believe the code requirement is only 18" deep but you should check with your local building dept. Mine required 36" deep. If you use direct bury cable you should only need conduit from the bottom of the trench, above ground, and through wall. At least that is all that I had to do here. I would suggest you run a 50 amp 220 service to a sub-panel in the garage, that should handle about anything you'll need for a home work shop.
Be sure you live your life, because you are a long time dead.-Scottish Proverb