If the animals are quiet and easy going, and have any training to electric, then I would go with that for starters. If they are quiet and don't have any training then still very doable.... Do 2 strands for better control. 18 and 30 inches off the ground or somewhere in that neighborhood. (2 ft and 3 ft). Plug in chargers are cheaper by a long run, and will give a much stronger jolt to get their attention and teach them to stay away from it. I would go with that for starters. You don't have to get the most expensive charger; one that is middle of the road just make sure it is rated for the length - distance that you are wanting to cover. If you make sure that it is not grounded out along the fence, and they get a good zap, then they will learn to stay away from it. The best thing is you are certainly not going to have too many head or overgraze it. They will be in hog heaven for a good while with all that you have there. The biggest thing is get some cheap surveyors tape and tie it to the fence at intervals so both the cows AND the DEER , see it so they can avoid running through it..... posts can be 20 ft apart if you string it tight and hang tape so they can see it. Deer will often go under so no less than 18 inches... but at least this will alert them that there is something there that wasn't there before.
Don't bother with any type of working up the ground this fall except where you are wanting to do a garden or "whatever".... let the grass lay, let the cattle work their way through it. You will have alot of grazing there for quite awhile if it doesn't get snow covered.
After doing the bush hogging, you should have a "feel" for the rough spots that might need to be "disced out". A year or so of haymaking on this will get it back in alot better shape than you can with. with working it up and reseeding and all that. If it were ours, we would keep it bush hogged to keep any unwanted briars/weeds/etc., and let it grow for either hay or bush hogging it off again maybe 2 x next year before weeds go to seed. If the cows do a decent job, I would go through and bush hog it again early in the spring; or later this winter, to "chop up" any thick patches into smaller pieces so that they will fall to the earth more through the grass.... it will feed back into the ground and the organic matter will be good as it breaks down through the earthworm activity. All the nutrients that the grass took out of the earth will go back from the grass going back to the dirt. It is so thick that "chopping it up" more will aid in that breakdown, but give whatever cattle a chance to eat what they want first. What they ingest, will come back out the other end so will be fertilizing it anyway. Maybe not spread out evenly... but still not bad. Get them accustomed to the electric, and you can move it some and let them have more area as time goes on and as you have time and money to enlarge it. I'd let them have a certain area, then enlarge it and let them have more. Rotational grazing is not something to worry about until spring growth... and you can then make the sections smaller, and save a good portion for some haymaking, and still give them plenty to eat.
Since you did not do too close in the "hog lot" due to the ups and downs, the quail will hopefully have enough place to winter over. You might want to talk to a sportsman club or fish & game management.... you might be able to get some help and guidance to maintain some quail habitat.... I know around here there are some incentives to set aside some ground for that as they are very few and far between here.... They are great for keeping some of the bugs down, and you ought to encourage them to stick around by maybe leaving a certain amount of land for them undisturbed.