Hey fosaisu! Thanks!
Here's your answers:
You could fit either 2 kegs and CO2 tank or 3 kegs and no tank.
The taps I think have 5 1/8" shanks, should be more than enough.
Door on freezer was already gone, the shanks are well below the freezer level and everything fits nicely.
Hope this helps, good luck on the build! Be sure to post pics!