In article . com, Joe wrote:

First contact your building inspection people and find out what
zoning/permit requirements are. Then go to Menards, HD, whoever, and
look at whatever prefab kit pleases you and fits the city codes. Line
up a good concrete crew for the pad and get a contract. Get a crew for
site prep and another contract. Go down to city hall and get a building
permit, now that you know roughly what your costs are.
The size of structure you contemplate pretty much eliminates vinyl
sheds. DIY steel buildings take incredible amounts of time and fussing
with fasteners to assemble and then need major interior work unless you
are only keeping rough eqipment out of the weather in them. Prefab
structures are by far the most cost effective in most areas on the
dollars per square foot basis. HTH

Also look into what TuffShed has to offer.. Someone had them put up a
garage a few years ago and it looks pretty good -- you will need a concrete
pad poured for most applications though..