The thing is, if you want to build a shed, or a mountain cabin, or a boat, or even a hobby airplane, (which are all structures) there are a ton of free or low-c

The thing is, if you want to build a shed, or a mountain cabin, or a boat, or even a hobby airplane, (which are all structures) there are a ton of free or low-cost resources and tutorials out there, many by working professionals. There are also a lot of free in-person clubs and meetups for these things in many communities.