Hello,
1. I spent approx two months time, added 80usd ad cost. But i managed only 1 sale. It's better for me to do my original profession (electrical engineering)
2. Only 1 sale in two months.
2. Yes, approx 80usd facebook ad.
Regards...
Approximately, I spent totally 55 USD for ads (via Facebook) in two months, but there's been only one sale. So I think that it'll better to look another job.