Pretty much every golf course has at least one Meter-Matic around. Maybe you could swing a deal with a superintendent. Lawns would probably need to be 1/2 acre minimum for it to make sense.
They are very difficult to trailer. I pull mine very slowly behind truck from place to place. Just keep it greased. I never need to move mine more than 10 miles and only a few times a year. If you are having bulk material delivered you would be better off with a small tractor and loader. I use one to load topdresser and a smaller (12HP) to pull it on grass. Does an incredible job. Jobs I do are 20/50 cubic yards.