Get a machine with everything, the little more upfront is nothing compared to being stuck with a machine that doesn't fit your business. I think your main machine(what ever it is) should be just as comfortable as your truck is. Think about it, you are likely to spend really long hours in a machine in bad conditions and having air with low effort controls is priceless or not getting rained on?
It is too hard to sell equipment sometimes I have found.
What was wrong with that Kubota you posted?
Do or do not. There is no try. yoda