mercilessltd
+1y
Well, given the fact you didn't say these snow tires are also truck tires, and that you have a set (albeit worn down) of "summer" tires, I'd highly suggest against using winter tires year-round.
There are some factors that can help, such as your typical climate, but two things come to mind: 1. they're winter tires, and 2. they're not truck tires. Passenger snow tires will wear even quicker than truck winter tires, especially when put on something as heavy as a truck (mini or not). I'm guessing if you look up the load rating on those versus a set of actual truck winter tires it's a bit lower. Also, if you are in a climate that gets terrible winter weather, you'll probably be thanking yourself for keeping those winter tires for the season.
The second item to consider is how long you are planning to keep the truck. Given that you are talking about modding (referencing 2" lift), this is no beater / throw-away truck. In that case, the likelihood of you having to buy a new set of tires very soon when those winter tires are gone (if you ran them constantly) is fairly high. So if you plan on replacing your Michelins, yes, the cost will be a bit high now, but save you in the long run.
Third, if these tires are as nice as they sound, then they probably cost a pretty penny. No sense in wasting a good thing (my opinion, obviously).
Also, as you mentioned, snow tires are meant for snowy roads at possibly lower speeds. 70mph on a blistering asphalt road for months on end can give terrible handling, quicker wear, and possibly even worse mileage. (Although you may not be concerned about gas mileage...)
In short, you have two sets of rims, two sets of tires. Local shop would probably charge $10 - 20 to swap everything, and I think the investment is well worth it.