A friend just went through this, as her ATV was stolen and she planned to replace it with another ATV. She had never considered a UTV…and when I mentioned looking in to it, she tried one, liked it and bought one and says it’s light years better and more useful than the ATV.
I spent the first 5 years here on my 30 acres with just a UTV, had a plow for the front. I had to pay to have pastures mowed, and doing it once or twice a year wasn’t enough…I want to keep the grass thick and the weeds down, which was 5 times a year at $400 a pop. That 2k is a little more than 5 tractor payments every year. It worked…but having the tractor has made all the difference in the world. If I had it to do over again, I’d have bought the tractor first.
Seriously, if a tractor is not in the picture, take a hard look at a UTV/side by side…way more useful and efficient than an ATV.
And unless you’re going with a UTV like a Bobcat ToolCat (extremely pricey) some of the attachments you mention aren’t available for an ATV. The mower won’t get any closer to fence posts than the tractor will…you’ll still need a weed whacker or Roundup for that. No auger. No snowthrower (but a blade and winch can work). My 1/4 mile driveway took me about 2 1/2 hours with the UTV (Polaris Ranger)…with the tractor and snowblower, it’s 20-25 minutes. A hay dolly will work best with your pickup, not an ATV.
Can you make it work with an ATV? Sure. If you’ve got lots of extra time and don’t mind hiring some things out. But seriously, sit down and add up all the costs for all the stuff you’ll need for it…I think, especially since you’re only wanting to buy everything new, you’ll find it’s going to be a lot more than you think.