Mr Urakunu -- Fallon is right (as he usually is!) Just a couple of comments: You said you have a mile of road to your cabin, banks to keep clean, etc. I'm still hoping to see a few pictures of your circumstance. Anyway, I was not up on the flail mower you are considering and after some study I am thoroughly impressed. Very attractive features. One question is how heavy a material will you normally be cutting? The flail mower is not intended for thick woody brush, saplings, small trees, etc. Neither would a sickle bar mower of course. The Martin side-frame rotary cutter you mentioned would be a heavy duty solution good for cutting a lot heavier stuff than the flail mower. If most of your need is cutting light brush and mostly weeds and heavy grass, etc. the flail will probably be the right tool. On the other hand if you have fairly frequent need to cut 2" thick material (and maybe clusters of it) the Martin (or similar, there are several brands) would be the better tool. BUT if that be true, you really need a larger, heavier tractor. As Fallon said, weight matters a whole bunch. If the heavier material is going to be your long-term challenge then spending twice as much for the mower may not be a bad idea but then there is the tractor ...and money. It never ends does it?
I don't have pics handy of the situation, cabin is 4 hours away. I wouldn't try to cut anything super thick with it, will be getting a grapple to handle that kind of stuff, keeping our extensive road system mowed and food plots along with the pond and some sides of the roads.
I'm not going to go larger on the tractor because I won't be able to move it on my own easily. The tractors I'm looking at I can easily move and haul attachments and implements as well. And you are correct it never ends with the amount of implements and attachments. Thanks again for the insight, it's much appreciated!