Yah, see...all these guys like dogs pulling at the end of the leash when it comes to garages....give the dog a longer leash he will still be at the end of it.
Garages are the same way...BUT
I say, DON'T DO IT! What happens; you build it and it fills with expensive stuff. You build it bigger and it fills with even more expensive stuff. And don't forget about that worthless brother-in-law who wants to sponge on your to store his whatever....just for "a few months".
Now you find that most the time you spend $10 per foot on building materials to store the stuff, and in the end, you spend $100 per foot filling it!
So now you're broke all the time...wife complains she doesn't have any money, and you have all those toys out there just wasting space.
So do yourself a favor....go buy a nice tarp for that car and use it. Then take all that money you would have spent on building the garage, and all the extra taxes you will pay over the years because your property taxes just went up, and all the extra utility bills and heat bills and maint. bills, and stick that money in the bank, or invest it....then instead of gett'n to 70 and figuring you only have 20 more years to work before retirement....back up and retire at 60, and then go buy all those toys you would have had to buy on time payments, rent some storage area and live the life ALL THESE OTHER GUYS WANT TO LIVE....and have lots of cash to live it.
Garages are land yachts that you throw money into and never get back.
Another plan....sneaky, but it works!
Drive around in the suburbs til you find some guy with two HUGE storage buildings....then go up to the door and offer to mow his lawn for free, then in the fall rake his leaves for free, then one day when you bring him a beer so he isn't thirsty watching you do all the work around his place, casually mention that you are envious of his big storage facilities and that someday you might like to build something to store your ^%$&^*& car, sleds, bikes...etc in it.
Naturally you say that right now, they are sitt'n outside for lack of storage area and rusting away.
This is where you stop and pause for at least 5 minutes saying ABSOLUTELY NOTHING...eventually the guy will HAVE to break silence and offer up his buildings for your "short term" storage. Of course over time, you will have MORE things in those buildings than he does and you hire someone else to mow his lawn, and rake his leaves.
This one works like a symphony orchastra...shameful, but functional.