OH!!!! Get better commuting tires once your stockers wear out! Stocks have like a 140 wear rating, get something above 300 imo.
FYI, the treadwear rating means absolutely nothing. A Michelin with a 180 wear rating could give you twice as many miles as a Goodyear with a 400 rating, because there's no standard for WTF the number is supposed to mean. So look for real world reports of miles driven on different tires to see how long they truly last, keeping in mind that some folks will naturally shred tires, and others will baby them.
For the OP, unless you know you're going to want to trade/sell in 2-3 years, why worry about depreciation? The older the car gets, the less the mileage affects depreciation. And if your concern is solely financial, you have to weigh the *possible* depreciated loss versus the cost to buy, register, insure & maintain a 2nd vehicle for the ensuing 2-3 years, too. (i.e. 5 year old MS3 with 25-30k miles value, versus 5 year old MS3 with 80-100k miles value... $2k difference? Maybe $3k? $4k
tops? Can you buy, insure, register, and maintain a 2nd vehicle for 2-3 years for that?)
If the concern is not so much financial and you just want your MS3 to last you forever, then I can understand wanting not to rack up the miles too fast. That's an entirely emotional concern and nobody but you can make that decision.