Hi Ken,
We lived in our house without outbuildings, except for a woodshed and a tool shed for 18+ years, until we gpt a Kubota B3230, and all of a sudden my SWMBO started to agree with me that we not only needed a barn/garage, we could afford one.
In the interm (fall 2011) we bought a temporary "tent" garage made by Shelter Logic from The Sportsmans Guide (it was a standard model, they just had the lowest price on it. It was 10' w x 20' l x 10' high (at the peak).
Then we built a 30' w x 45' l x 16' high (at the side wall) pole barn with concrete floor (12/2012).
We kept using the tent garage for miscellaneous storage until it fell down in January of this year under the combined effects of 24"+ of packed snow and ice on top of it, and 50 mph winds with gusts to 85-90.
That said, I wouldn't recommend one, even though it was cheap and yet lasted a long time. The reason I say that is because it only lasted that long by diligent action on our part in the form of reinforcing, and re-reinforcing the tie downs, the bungees, and both screwing and tying the pipes together.
On the other hand, I have some neighbors who have agricultural grade "temporary" fabric structures (from Farm Tek, for example), which have been up for as long as I have been in my house.
One of the differences I see between the agricultural grade and consumer grade fabric structures is that the covering on the Ag grade ones is usually one piece, as well as being of a heavier construction.
I also recommend you check out Hansen Pole Barns- whether you buy from them or not, their site:
Hansen Pole Buildings | Affordable Pole Barn & Building Kits has a lot of good information and may help your thought processes.
I have to agree though that the Morton Buildings are top notch, but they were out of our price range.
Best of luck,
Thomas
PS: As we were told and has been said on here numerous times: "Build it bigger than you think you are going to need it, or you will run out of room too soon.