I started vaping to save money not for my health.
My VV evod style batteries cost me between $3.50 and $7 each. I got my T3's for $3 each and several genuine Evods for $1.50.
I have not had any batteries nor tanks fail me yet.
I bore out the air holes and use cotton wicking and they vape pretty well.
I found I enjoy vaping much more than I did smoking and spend less than 25% as much and I only spent about 130/month an cigs.
that's not frugal.... that's being a tight wad

Nah, that is very cool of you for sure.