Anyone here have experience raising meat sheep on small acreage?

Biggest concern is predators and dogs. Mostly dogs in my experience. Also keep them wormed. I guess being a flock animal if a sheep is sick they are literally about to die, so keep an eye on them.

That's definitely enough room for some. Number depends on food available.

They're born looking for a place to die. If they aren't going to be close to your house you might need a guard dog.

I'd recommend hair sheep so they wouldn't need to be sheared, also depends on what part of they country you are in. Some say the meat is tough, I've never had that complaint.

Two adult sheep per acre. You can put more if you are able to implement rotational grazing ( moving them from area to area as the grass becomes available, and allowing time for the worms to die). You can crowd them a little if the grass is good, less if it is not good. If you are raising lambs to size for personal consumption, you can put a few more, as they won’t be there too long as you oppress only trying to get them to 55-65 lbs.
Make sure they have access to shade and good clean water, A shelter is recommended, three -sided is fine. Hog wire around the perimeter should keep out most predators. Good to make rounds periodically to make sure nothing is trying to dig under to get at them.

Katahdins are highly desirable, for their meat, hardiness, and rate of growth.

Wow. That’s a heckuva fence. I know goats are bad about getting out, but I don’t believe they are getting out of that. And the coyotes ain’t getting in either.