Mahindra 8100—is this thing junk???

Purchased a new Mahindra 8100 and 15 ft batwing mower Sep 2019 for use on my fathers farm. 90% the time this tractor will be used for general mowing of 140 acres. My father is 81 and due to knee issues cannot use this. I live 90 miles away and am the primary operator of this tractor when I can get to the farm (every 3-4 weeks). Tractor has had nothing but issues every since it was delivered. 30 mins after it rolled off the trailer, DEF system light comes on and it goes into limp mode. Tractor picked up next day by dealer. Sat in shop for two plus weeks to get a new DEF tank and heater. Next use things start falling apart on it. Exhaust stack bolts come out and stack falls off in field. Lift arm retaining pins come out and lift arms flopping around and chew PTO shaft to pieces. Interior lights, radio, horn stop working. Rear wheel lug nuts back almost completely off and wheels almost fall off. Dealer comes out to assess if wheel studs have been damaged. They apply RED loctite, tighten them up and call it good. At about 50 hours, plug for PTO sensor comes unplugged and DEF dosing valve blows its guts and spews fluid everywhere. Dealer comes and tows it out of the field and have it for three weeks. Get it back and finally finish up fall mowing. Tractor is used every 3-4 weeks for some minor stuff. Fired it up 15 Aug to mow about 80 acres in the back. Mow for 9 hrs without a hitch. Took a break, eat, refuel, and back to the field. Mow less than 10 mins and check engine light comes on and goes into limp mode. Dealer comes get it on Monday and now it sits at the dealer again. Corporate tech guy is scheduled to check it out next week...dealer says they called corporate since this tractor has had som many issues.
this thing spends more time in the shop than it does the field!! Currently has 102 hours. Like I said, I live 90 miles away and when I get to the farm...I need a tractor that will work!! Dealer tries their best and Mahindra corporate has been as useless as the tractor...their answer for EVERYTHING is “talk to your dealer”. My father is 9 kinds of irritated about dropping $73,000 for something that breaks every time it is used. I’m interested to hear input and feedback on the 8100.