Since you have no equipment you should do some research into costs. I think you will be surprised at low little $700 is. I see 4x8 and 5x8 utility trailers on craigslist from 400-700. You can make do with residential equipment but it is not built to take the punishment of day in day out work that commercial machines are built for.
21" mower, string trimmer, hedge trimmer and blower are the minimum for what you have described you are looking at ~900 for good quality homeowner stuff, if you buy commercial you could be looking at $2200+