I would be careful, you would need some insurance to be working UNLESS you were doing it as a favor... the kind of favor were you get paid. Its obtuse, I know, but you still need insurance I would think.
I have had clearance to do a job but the neighbor always shut us down. It was a little mental institution but the work had to be done.
I put on a ski mask, dark glasses and a forestry helmet with plugs and muffs, went in, coned the whole area with caution tape, fired up a little saw and waited. When they came out I pretended to work frantically cutting a log reving the saw and push it back and forth. Ever once in a while I would swing the saw out and around in an arch and go back to the cut.
This went on until it got funny and kept getting even funnier til the police came. I had stopped cutting after they showed, they just told me to keep going and they told the others people to let off and that was that.
But cops don't always care about insurance but HOA's do. When I did tree work the side when I was young I had to decline work for certain HOA's because I didn't have insurance.
I just looked at a big job in the back of a condo complex. Its all concrete side walk to get back there but first I got to hop the curb and drive across hilly landscape. I bid the job to do it like that, not manually drag the stuff out. They don't like it? Fine, I'll go do a job where I don't have to put up with that BUT they do have a right to be worried about people driving over curbs. I can do stuff like that and not damage anything however they do not know that.
And god forbid you get hurt or any of your help does either.