As far as I know ultimate will match wheels. We got ours match for the patrol. I quick call to them would confirm that.
I wouldn't be concerned about the fusion, for the money you could get a better system and add it yourself later.
We didn't have an option of their "outdoor kitchen" described loosely, but we just use stove and table, which has multiple uses and can be moved anywhere around the camp as needed.
We got a main awning, but no walls, and haven't had the need for them, just go inside if that bad, but it is only 2 of us 99.9% of the time
We have a std drawbar and I find it ok, but I have being reversing trailers since I was young or younger
we have a spare on the back of our car and it doesn't foul on trailer, but I think it is more of an issue with the wagons that have 1 large door that swings open.