Hi, I am planning to build a detached garage with electrical which is about 24' from the house main panel. I plan to have about 6 outlets and one with the 220V for the washer\dryer in the garage. What will be a ideal Amps to support these? Thanks in advance,

Assuming the outlets will not be used for large motors, welders, or any other large load, 50 amps should be sufficient.

Oops, forgot about the automatic garage opener too, but probably won't make much of difference. Thanks a lot!