EOREGON, you nailed it. Put a kit on and the accessories you indicated and ride. They do require some maintenance but nothing crazy. The running issues are not a huge concern. I have a group of 5 bikes we ride with that have just those basics done that you described and we are having the time of our lives. The odd minor thing to address but we have been relatively problem free. We are all in and around 50 years old and are dirt bikers, some are sledders. We all absolutely love it, its WAY easier to ride than a sled in my opinion and it makes tree riding and difficult terrain super fun. Bonus is they don't necessarily shine in the alpine which is keeping us all safe and out of avalanche country but still maximum fun in the mountains. We tended to boondock and tree ride anyway last number of years.
Thermostat and engine blanket for sure. We have had good success with just an outwears cover over a dry stock foam air filter. I think I had to stop and clean snow out of my airbox two times in two years of riding and some of it was nipple deep fresh pow. Aftermarket intakes work well too and are not expensive.
Rekluse is nice but not necessary at all. I am tall and don't find it a problem, shorter riders may like it more because you don't have to reach across for the clutch when you are standing in knee deep pow trying to get going. Nice to have if you want to "burp" the bike out of a hole if you are stuck.
I will say that overall it feels more like a bike than a sled when you are riding. If you are comfortable on a bike it will be a piece of cake.
They use way less fuel than a sled so the frequent oil changes (1.4L at a time) are not really expensive. Regular bolt check and chain adjustments and lube are about it for regular maintenance, nothing out of the ordinary for a dirtbiker.
I ride a Husky FC450 with a Timbersled ARO 120. Last bike was a KTM 450SXF with a Yeti 129.
So which kit do you like of the two? Timbersled or Yeti?