Buy a sawmill they said, cut your own wood they said, build whatever you want they said, it'll pay for itself they said. Okay I bought the dang sawmill now where do I buy the time to use it to mill the lumber to build the pole shed?
$5000 won't get you too far on a building big enough to cover an RV. Unless you could do a lean too on an existing building. Around here the darn permits, drawings, engineering costs are getting crazy. Someday the Building Inspector is going to drive in my laneway and I'm gonna have a red face. I may have built and changed a few things with no permits. ( shhhh 24x 56' shop)