i've been thinking of trying this also. right now we're about 30/70 maintenance/install but looking to expand more into full service maint. I was thinking of offering a complete package - snow clearing, weekly mow and trim (18x), organic fertilizer (3x), aerating and fall clean-up for a price of 100-125/ month (3-5k lawn size). add-ons would be 10-20/ month each (eaves cleaning, overseed, topdress, hedge/shrub trim, dethatch, spring/fall window wash, re-mulch beds, etc) Of course the beauty is that you only make the sale once instead of having to do it over and over again for each service. i figure if we could get 50-60 accounts we'd be set 2 days a week in summer and focus on installs (with higher margin because we cab 'afford' not to get every job, thus higher price) 3-4 days. informal market survey has shown people like the idea of taking care of everything (external maintenance) with one contractor. only thing we're not sure is best way to market it.