75 acres here, 2 lakes, gravel driveway, dirt lanes, mowed lanes, other trails on property, up to 5 foot snow drifts when it does snow. 30 plus acres of pasture with half approx wooded. lots and lots of hills all over the place.
a SCUT (sub compact utility tractor) you might as well forget about. they are for city slickers, with small size acreage. 80 acres is not small by no means.
stay away from "skid steers" they simply have to low of a top MPH to move across the property. for me one corner of property to other end of property is about 2 miles, of curves and hills and tight spots going through gates and like. it does take some descent time to get from one end to other end. and i doubt a skid steer would ever be able to deal with time constraints just traveling.
i would say min 30HP tractor. this puts you in CUT (compact utility tractor) range. this will be maintenance tractor. that should get you through most jobs. the areas you would have issues, would be pulling trees to different areas per say, to FEL lift capacity and/or 3pt hitch lift capacity. all other maintenance stuff should be good enough. and only a bigger tractor to get things done quicker.
to note it. i had choice of getting smaller tractor with all the frills, or going with a large used 80HP TLB (tractor loader backhoe), i needed more tractor to get some stuff done, so for now property looks like a mess. due to limited to only FEL bucket and backhoe bucket, and the old allis chalmers tractor 20HP is more mowing tractor than anything else.