Get front and rear chains for your rotary cutter. The rear chains help keep from throwing stuff to the rear and killing someone, and the front chains help to keep you from throwing something into your tires.
Loader mounted third function would be a plus. The Kioti third function is overpriced. I suspect Bobcat would be the same. You may be able to find something aftermarket that's cheaper. Ask your dealer about options, and see if you can source it and roll it into your financing...unless you're paying cash.
Forks and box blade would be on my list too. I already have each, and the forks are super handy. You'd have to spend a few years without them to truely appreciate them, but do yourself a favor and get them now. They're relatively inexpensive compared to everything else you're getting. Box blade is handy for driveway maintenance, but if you have the $$$, you may spring for a land plane instead.
Skip the
chipper. I've wanted one off and on for years, but had some wisdom imparted on me by a few fellows on this form. Also my powers of observation helped out in that regard as well. To put things through a decently affordable
chipper, you have to spend a lot of time chopping off limbs to put them through the hopper. If you get one that's over $2K, you can get an auto feed that takes less prep and has a bigger hopper, but you'll also need a larger tractor to run it. It's MUCH cheaper and more convenient to simply burn limbs and branches. If you want mulch, get some delivered. Still cheaper than wear and tear on your machine, your time, and the cost of the
chipper.