I have a customer who insists on making his yard harder to cut. Since I started doing his lawn 3 months ago, he has added a swing set, 10 trees with small rings, and a playset - all situated throughout his backyard. After the swingset I thought - OK, a little more trimming but no big deal. After the first 5 trees, I thought the same thing. Well, now it is taking me 15 to 20 extra minutes on his yard every week... The problem is this is one of my best accounts (as far as price and timely payments). I would hate to lose it, but then again I hate doing extra work for free. Any suggestions?