Thanks (for both replies)! I do have a lab plan as well (6 transferable accounts at $2460 per year) but as you've pointed out, that isn't a one off cost. The problem I have with the one-time purchase is recurring costs for storage, hosting, etc. as it's a web based SaaS. Nevertheless, excellent advice... I'm going to have to start researching my options on one-time pricing. Thankyou!