An acre and a half of lawn is child's play for that Case. I would not classify any Case as a tight-turning machine. If that is a deal-breaker, then I suggest that you test drive the tractor in advance of handing over the cash.
The Case is a well-made machine with a lot of attachment versatility thanks in large part to the fact it uses hydraulic drive, not hydrostatic drive. You will quickly learn to love the tiller because it can be run in either direction at the flick of the control lever on the rear PTO. The 16 inch rear rubber will give an excellent ride quality that few other tractors have.
Because these tractors are built so strong, not much goes wrong with them other than the normal wear parts.
The rod ends on the drag link and tie rod do wear out because there is no way to lubricate them. Careless owners fail to lube the axle pivot pin and that area can get sloppy. The steering gear is easily adjusted to keep it tight but those who don't read their Owner's Manual are oblivious to that procedure as well as the location of all the other grease fittings.
Essentially, these are all small items. Many can be found at a local supplier. Keep in mind that this tractor is 39 years old and has likely gone through more than one owner in that time. Just to buy a replacement tractor today would set you back about seven grand with the deck. Add another 2 G's for the tiller, 1 G for the 3 pt, $300.00 for the sleeve hitch adapter, $400.00 for the hydraulic PTO , $800.00 for the blade, $1600.00 for the snow blower, $1000. 00 for the cab and you begin to understand just how good a deal this package is.
So, if you do buy it.... don't be afraid to spend some money on it to replace parts that show wear. There's a big gap between $2500.00 and $15,000.00 and it's money well-spent if you intend to keep the machine long-term.