>>971926a log cabin is more work than its worth. stick with standard stick frame construction mounted on concrete piers.
its quite easy. i taught 18 year olds who scored the bare minimum on the asvab how to do it when was in the military. pic related.
dont worry, it doesn't have to look like that. just use some nicer sheathing and paint it a different color than OD green.
a standard 16x32 "shell" can be done for around 5k$. finishing the interior will cost more. Larry Hann videos are your best bet just to learn the framing technique.
https://www.youtube.com/watch?v=dqM7ekLfSmA 