[pmontra]

What's going to be a good balance between convenience and financial safety?

Maybe start with Stripe because it's easy but use only the very basic functionality. If the business starts to grow, add an old style bank, one with humans to talk with, and move all the transactions there. Then say goodbye to Stripe.

Could that work?

[jacquesm]

Always use more than one IPSP so that you can spread your risk and if you ship physical goods hold on to them until the money hits your account and explain that to the buyer. If they're not comfortable with that give them an alternate, such as a direct transfer into your account.