Sorry, I missed the rotary cutter part also. A 5' cutter would probably be ideal for your use. For one thing, maneuverability is better than with a 6', and on slopes, the 6' is mighty heavy. You should be able to easily cut 1" and even better, but slowly SLOWLY backing into anything larger a little at a time. Let the blades start cutting into it, and ease back a little more. I've cut 3" stuff with my 1" cutter doing it this way with no problem. Just be SURE you don't back in too quickly and shock the whole system. I use an inexpensive Howse cutter that's holding up pretty well. I understand the First Choice cutters are good, very much like the Woods, at lower prices. Whatever you buy, just look at the welds and see if they seem adequate. Woods mowers have a little better lubrication system than some others which may add to it's life. John