Math on having a second vehicle

I have a 3rd vehicle. The GMC is a garage queen but it's because I only drive 4.7 miles to work. The truck never got up to operating temp and I didn't think the short drive was doing it any good. Bought the wife a 1 year old Vibe I got a good deal on and I took her old 97 Honda Civic. 30 mpg, license is $22 a year, insurance is $160 for a year. I do all my own maintenance and any work I can still do but it hasn't been in a shop in 7 years. 17 year old car with 89K on it. Still runs great and the A/C is ice cold. The truck will be 10 years old this coming April and has 59K on it. I expect it would be the last truck I would ever have to buy if I was so inclined. Only comes out to tow the 5th wheel and if I happen to need the bed to haul something. Plus like 2112 stated, it's sure nice to have a spare vehicle.