The biggest problem has alway been supplers! I was going to setup to do it a while ago. Talk to a couple... more then a couple of suppliers out of the states( where most of them are) unless you have a China connection ...most where , well ,let say, a little arrogant , and with the attitude that I owe them something. Maybe it was just me, and my experience with them, but that turn me cold. If the supplies aren’t on line with your business...it makes it hard ( for me) to give them my money. And I’m the guy that doesn’t mine spending $$ for a good return. I guess the business is , so good south of the border that they just don’t ....well you get.
My 2 cents.
Wish you well.
Cheers
Brian