First off, you should be insured with liability insurance especially for a commercial property; this will cover you if you break a window or worse, and what's more, most will not even bother to hire you if you don't have it. These policies can cost anywhere from a few hundred a year to upwards of a thousand. I personally am all residential, and it is usually better for a few reasons: there can be more money involved for customers who want to spend extra to have nice lawns; customers will refer you to other neighbors if they like your work; customers can be more loyal and won't dump you for the next better thing. As far as finding a 36" WB w/ Sulky, I can't really help you as they are virtually non-existent in my area, although I know you can find one under $800-900 and I wouldn't go over that. For properties that size, I would definately get a B.P blower, at least 400-450 CFM. As far as a truck, I would suggest at least a V8 f-150 or Chevy 2500; a four cylinder won't even start with a 36" in the back, and a v6 will probably fail trying to get up a hill. I found a good 6x12x4 trailer for $800 on CL, don't spend more than necessary. Hope this helps.