Tractors are designed to smooth land, using Three Point Hitch mounted implements.
Moving boat trailers utilizing a ball hitch on e the front and/or rear of a tractor is a common 4-WD tractor application.
You can calculate how long it will take you to smooth eighty acres using a Land Plane/Grading Scraper by entering 4 mph + LPGS width into following Mowing Calculator.
www.landscapecalculator.com
For eighty (80) acres you should consider a commercial LPGS:
he Road Boss Grader Commerical Grader has 24-inch side pans and is 6 feet deep. Road Boss Commercial Graders come in 4 models.
www.roadboss.org
Four models requiring a spread of 60 horsepower to 150 horsepower.
LPGS has almost zero learning curve for the tractor operator.
If it is dry and dusty where you are, consider a cab tractor.
After you decide what weight and width LPGS you may desire, we can give you a tractor recommendation.
The lot seems to have undergone some haphazard repairs along the way. There are spots with #57 slag, fine slag, fist-sized concrete chunks, #8 stone, sand, etc.
Second recommendation for an implement is a rear/angle/scrape blade:
VIDEOS:
https://www.youtube.com/results?search_query=compact+tractor+scrape,+rear,+angle,+blade
When considering a tractor purchase, bare tractor weight first, tractor horsepower second, rear axle width third, rear wheel/tire ballast fourth.
BUY ENOUGH TRACTOR.