You don't think its professional to call a place or stop by a place that needs to be cut?Yes, it is possible.
No, it would be soliciting.
Property for sale is a whole different thing. In most cases, they don't care...it just gets gets knocked down once or twice a year. For what someone can go in and brush-hog it for, you can't touch it for the wear and tear on your equipment (unless you do brush-hogging, too). I know guys around here do brush-hogging for 20 to 40 an acre. Do you really want to spend an hour and a half, putting your equipment through this for that much?
How do you MULTI QUOTE ?????????Yeah, I agree with Joe but sometimes you'll see houses for sale with nice turf that just needs to be cut.
I usually give the realtor a call and see if they need anything.
No, I don't consider it unprofessional at all. Solicitation is part of any business, and if you're not soliciting, you're not getting work.