I was utterly shocked that mine started yesterday at 3 degree temp. And a foot of snow on it. But it did and ran well. Must be all the YAMAHA parts I have put in it
Not sure if this would be an option for your 550: I'm using a 72" KFI plow on my Hisun Sector 750 - works well. Driveway is 350'+ x 12'. One pass down the middle and then one on either side. (photo is UTV with plow at the dealer's - was delivered that way). Note - need to manually adjust plow angle.
I bought a new Hisun Sector 750 in Jan. 2021 mainly due to price and features. I also bought a plow with it to clear snow from my 350' driveway during the 2021 winter since we couldn't go south due to covid. Like Alien10 I use it primarily to haul firewood on our 75ac property and although licensed and insured I rarely take it out on the public roads. I don't abuse it but don't baby it either. I've used the winch a lot to haul large logs out of the bush to where I can easily cut them up and haul the pieces back to my wood pile.
Other than the first winter, it's stored in an uninsulated shed in the winter - only storage prep is to add and circulate sufficient fuel stabilizer. I've left the battery in and cables attached - so far it has fired right up in the spring. I have about 75 hours on the clock.
As for maintenance, other than oil changes, I've been fortunate - just an issue with steering last spring when it would suddenly jerk to the left while driving in a straight line. It was an intermittent and baffling problem. Also fortunately I found a sales/repair shop 10 miles from me that also handles Hisun and they were able to solve the problem.
All in all, I've had a positive experience with my UTV and it's doing what I need it to do. YMMV
There is nothing convenient easy, or reliable about anything named Hisun..in my experience they are cheaply built, poorly assembled, unreliable, and not backed by any thing resembling warranty or customer service
Had someone warned me before buying mine new at Tractor Supply, I would have bought the Honda or CF MOTO