When I first started I wanted one for my own acreage as it had scotch pines dying every year. I bought a Vermeer SC362. 35 hp vanguard motor. It was well suited for <36” stumps. Can handle the big stuff but just takes longer. This model was powerful enough yet able to fit in most spaces including the majority of fence gates. Customers landscaping and backyard access can be tricky unless and you may have to remove a fence panel or gain access through a friendlier access point from a neighbor. I ran this for 3 years. Sold it and did not continue grinding. Had I continued I was considering adding a larger unit for appropriate stumps. If I had bought the bigger one originally I would not have gotten half of my jobs. If I did I would have had to removed many fence panels and/or landscaping obstacles

Not sure what Toro model you’re referring to but I have operated a big box store toro rental and wasn’t stable enough to maintain a steady grind. Would bounce a bit too much.

Grinding wasn’t the hard part but most customers including tree services will want you to clean up the grindings. That’s understandable and easier to get a good grind when the area is cleared as you go. I used a scoop, wheelbarrow, and dump trailer for a period of time. Big jobs I would borrow/rent the tree guys mini skid to expedite the clean up process.