Well it sure shouldn't take more than 5 mins to do a 10x20 lawn. And yes 100 lawns can be done in a week if majority of these homes are on the same street. unload once/load once. I dont think hes loading his trailer to go over to do the neighbors house! I wish i could've done this when i was his age....think about it, ya he'll be burnt by the time hes 50, who wont be? But he'll be sittin on a warm beach enjoyin life while everyone is still workin. I never knew what i wanted to do when i was his age, this kid already knows what he wants in life and has a huge advantage over the rest of us. So ya, a plan is good! So I say "good job" onlythebest! keep goin man!