On average I do that for probably four clients a week, and it really doesn't take me very long.
Well, I can give you comparable figures at let you decide. We did a survey last year, and our customers self-reported they received payment on average 8 days faster and 43% of respondents collected 15% more revenue than using Word and Excel. They spent on average 5 hours less a month (8 to 3.2 hours) doing their books. See http://www.freshbook...survey-results/
You sound like you are far more advanced than the average Word & Excel invoicer. The main question I have for you, then, is how much time you spend on collections right now? One of FreshBooks strengths is tracking delinquent invoices and following up with customers, as well as providing different payment options like PayPal, credit cards, and echecks. We also can generate a physical invoice we put in the mail for those customers who need paper in their hands before they cut a check.