pole shed questions

ok time for a flame thread-- I've finally wore the wife down & we are planning next year to put a pole barn in the yard for my car hobby.

the reason for a pole shed is cost -- i can get the structure up & then add a concrete floor at a later date,, putting up a garage needs tons of concrete first & more $$
I've looked at Sutherland's & Menard's to get an idea-- but i have to check on codes to see what my restrictions might be.
I want at least 3 single garage doors & a man entrance on the south side.

my plan is to section off the south side into a work space for heat/comfort & the rest used for cars/lawnmowers /storage.
I'm looking for advice from actual users/experience on what would be the most cost effective way to approach this.

I have to clear 15 trees & a small lean 2 in the yard now
I think a 30x40 -- maybe x50?(cost)
also do not know what the ceiling requirements are for a lift-- but that would be a consideration.
Windows? 2nd man entrance?
Thanks Lawrence