e-Bike Commuting: Buy a Pre-Built eBike or Conversion? Already have a good bike...

I figured I'd post this here for commuting instead of just the e-bike forum section.

Thanks ahead of time for hearing my situation out and helping me as a noob to e-biking. I have been researching and am having a hard time deciding whether to buy a e-bike, or convert mine to a mid drive system...