How do you feel about learning to code? My GF spent the first 20 years of her professional life in theater and learned to write code in her early 40s. After a few years she was making nearly double what the arts paid - which wasn't much. She didn't get a degree (already had a fine arts degree), just did some boot camps and worked up from there. It is probably really dependent on how many tech jobs are available in your area, but way cheaper than an MBA.

I have a undergrad business degree and having worked in cooperate jobs since college, I find it to be 100% useless. YMMV

Seriously, you are selling yourself short if you think Wal-Mart is where you are going. You can build a strong resume out of owning your own business.