$23,000 would be a good price, but not reasonable in all markets. The best way to get an idea of what the tractor will actually cost you to buy, is to request a quote from 3-5 dealers in your region/area. Don't forget options, tires, setup, delivery, etc. Tires alone can change a price quite a bit on the
L4610, as can a number of options available.
7' would be the largest cutter you would ever want to put on the
L4610... depends on your application. I wouldn't go beyond 6' unless you have a light duty use for the cutter. Regular mowing of a controlled field, for example. Even then, you're beyond any suggested use for a 7' medium duty cutter.