I'm a freelance myself (since 2005). I ultimately scratched my own itch and created an app specifically for this: https://www.wisecashhq.com I built it pretty much for what you describe: to plan my future (it computes your runway & "time wealth"), adjust working hours as needed, "make time" for other topics, negotiate based on data etc. The goal is not to "track all expenses", but rather to make a reasonable forecast…
interesting! the features do sound similar to what I'm looking for, unfortunately the monthly cost is too high for me :(
What would be a "good" price for you?
(asking because when I'll make a complete rewrite, I want to have various price ranges, including a lower starting price).