If you are considering Wave as a cloud accounting system here are some things to consider.
COST OF PAYMENT PROCESSING There are costs of using payment systems. A careful comparison of the cost of using debit and credit card transactions is recommended as the difference may outweigh the monthly costs of a QuickBooks subscription.
APPS INTEGRATION QuickBooks integrates with many more Apps such as Square and Shopify that can help you automate your business.
PAYROLL Although Wave is advertised as being free, payroll has a monthly cost.
Going to the Cloud has great benefits, but careful consideration of the programs is recommended. For a more detailed analysis see this article: Merchant Maverick