If you won't till often then renting is smart.

I'm not a fan of 4 wheel steer. more mechanically complex and more to break.

Plowing a gravel driveway (tractor or truck) means you'll be buying gravel in the spring. Little tractors don't push snow well and it builds up narrowing your driveway. With a blower you put the snow way out of the way every snowstorm.

IMO, best bang for the buck... buy an X500 (or current equivalent model) with 44" snow blower. As nimble as your X300 with more power and ground engaging capabilities. You'll want wheel weights and 4 suitcase weights for traction and to offset the blower weight. You can add electric power lift kit for the blower if you don't like the pedal or upgrade to model with hydraulic lift for more $$$. Trade in your X300 to the dealer or sell it outright.

Biggest smile... buy a Kubota BX series with FEL and mid mount mower. Perfect size tractor with hydro, 3ph, and 4WD. It's more tractor for less $$ than a JD X7xx series.

Moving snow with the FEL is a little tedious, and you can install a blower, but the fun you'll have with the FEL all year long will mitigate the cost. You can get a BX with just a mmm and add a snow blower or front blade or FEL later.

Sell the X300 on craigslist.