I have spent my fair share in the last 3 years, but as of right now, I basically vape for nothing. I DIY my own juice, but I sell a portion of that to a few of my sons friends. I get about $60 from them a month, which more than pays for the PG/VG/nic/menthol I use. I might end up selling 2/3 of what I buy, but get about 150% of the cost of materials (rough estimate)....works out pretty good, and the remaining 1/3 is more than enough for me. They are still getting a good deal at $20 for 240ml.
I am satisfied with my mods and attys, have plenty of wire and cotton. Now that I have found my vaping happy place, the government will swoop in and turn it all upside down.