You don't need an architect for a 2 car garage. You can obtain building plans elsewhere for free.
decide on the type of build, site for the structure, pull a permit, excavate the ground, pour footings and a slab, then build your structure per the plans, have the final build inspected.
It appears the contractor you called has a pretty good idea of what it would cost and didn't feel he has to drive out to your place to tell you what he already told you over the phone. If your contracting out the build then call and get 3 quotes and use your judgment as to who you want to firm up an appointment with.