The first step is to go see a professional head examiner
You probably aren't getting much response because it is asked so often on here. If you do a search, you will find several threads on starting a new mulching business.
You can come watch us anytime, we'll even put you to work. But it'll be a little drive to Charlotte, NC.
In a nutshell, if you can pay cash for a small mulcher ($200,000 new or $100,000 used) or a CTL setup for around $100,000 new (which will break a lot more), pay cash for a truck in the likes of a F-450 - 650, although a single axle tractor trailer works much better (CDL required for both) and a 10-20 ton trailer, then have $25,000 left over for fuel, parts, and repairs you can get started. Then be prepared to not be able to draw a paycheck for a year or more while you build the business.
Sounds like an exageration, but it really isn't. Mulching is brutal to get started in. People aren't amiliar with it in most areas and it's difficult to market. Large contracts go to experienced companies. Many bids even state that experience outweighs price.
That's why you need to be able to do it as a hobby (a very expensive one) on your own land or friends and family's land to get some hours in the cab. Pick up small jobs here and there and give them flat prices vs by the hour so they aren't pushing you to hurry the whole time. Experienced operators can go faster than new operators and get better results. New operators trying to go fast break a lot of things and leave a mess. Build your experience on small jobs so if you price it low you don't lose a ton of money.