There are guys out there with bigger brushhogs that work well in the wide open flatter areas but it seems what I mostly am hired for is brushhogging mixed woods and small fields and grown up yards with the occasional business lot. I make good money with a 2 hour minimum in our area and sometimes hit 5-6 small jobs a day with a few large scale jobs like the one I am on. If my Brushhog was even 2 feet wider I would not be able to Brushhog about 30% of what the people in the pictures place want done due to having to pass between the trees. Have never brushhogged a property with cattle which is what our big wide open flat areas have and is the only place I could see needing larger equipment.
Other thing of note is when commercially doing this you want to be able to easily haul the equipment and you want breakdowns and flats at an absolute minimum. 3830 Grand L Kubota tractor is dead nuts reliable with plenty of power and an FEL to feel along for stumps and stuff and to push logs and brush out of the way, Rhyno 6" hog with clutch is HD enough to take a beating, R4 Industrial tires are much tougher than AG tires and only flats I have ever had have been on front even brushhogging fields of black locust and prickly pear and they do not tear up the yards.
I haul everything on a 18' car hauler pulled by my 3/4 ton Ram. Easy, compact enough to maneuver equipment and transport...perfect combo for what I do...
Next tractor will have a bit more HP/weight and perhaps a Backhoe because I get lots of calls about removing a stump or fixing/putting in tin horns...
We are good on rain for now but I know we are always only a couple windy hot weeks from a drought again...kind of like eating as much as you can in a sitting and then nothing for a couple days...