Thanks for all the great feedback. I'm going to opt for an annual billing plan implemented via the Freshbooks API for now. Since I won't have a merchant accou

Thanks for all the great feedback. I'm going to opt for an annual billing plan implemented via the Freshbooks API for now. Since I won't have a merchant account, I will not be able to offer a recurring monthly option. I was researching merchant accounts and processors and planning to implement an automated system via authorize.net ARB. However, I found that this would actually give me less flexibility with pricing vs. a more manual solution. If the volume gets too high, I'll worry about it at that time (a good problem to have). Since this a B2B venture, checks via mail is probably a preferred option over credit cards (at least I hope so). With Freshbooks, I can probably implement monthly billing later on via Authorize.net without many changes.