Things you forgot: Eye protection, ear protection, sunblock, safety cone, edger blades, hand tools, loppers, hegde trimmers, air compressor, backup blades and belts, straps, bungies, tire repair kit, first aid kit, flashlight, sprinkler heads and pvc glue, chainsaw, jack, toolbox, water cooler, debris bags, full metric and standard socket set, extra trimmer heads and springs and eyelets, etc etc etc. These are just a few things that I have on my rig that come to mind. There are more even. I think it is great that you are budgeting from the get go - but it is not only the major equipment that costs in this business. The little nickel and dime stuff ands up fast and can eat into your profit. Sounds like you have a good handle on things - best of luck to you!
A Clear Difference Lawn Service
Toro Timemaster 30
5 x 8 landscape trailer w/rack
84 accounts cutting grass and loving it!