I'm going to tell you a secret. You can develop an online presence yourself. It's a radical statement for a social media consultant to make, but it's true. Below are some of the tools that I have used or use. Many are free and some do have a subscription fee if you want to use their premium services. I've included links to sites and tools I like, some of the paid versions are affiliate links, which means if you purchase from them I earn a few pennies but you still pay the same price.
Accounting and Money Management
Wave Wave is a free double entry accounting platform that you can use for Invoicing, Receipt Scanning, and Personal Finance. Those are their free products. They also have several paid products including Payroll and Payment Processing. You can use wave to manage an unlimited number of business and you can also split transactions into business and personal
Free Accounting Spreadsheets If you really want to go simple, I've used the free spreadsheets offered by Basic Accounting Help. These are straight forward excell spreadsheets that you can use to track revenue and expenses. You do have to sign up for their newsletter initially to get the free spreadsheet.