i don't really do spring cleanups unless it's a new customer that didn't have a fall cleanup done.
on existing customers i just blow leaves out of the beds and such into the yard and then mulch them up with the mower. i do this from the beginning of nov until right before christmas. do each yard every two weeks so about 3-4 times. i charge a little more than a regular mowing. it only takes a little longer than a normal mowing does.
3/4 of my customers don't get their leaves done where i live in alabama. either they have a very few trees in their yard or none at all. the other 1/4 have several trees in their yards and get them removed.