ProjectionLab - Build Financial Plans You Love
ProjectionLab - Build Financial Plans You Love
projectionlab.com
ProjectionLab - Build Financial Plans You Love
Simulate your financial future. Build modern and privacy-friendly plans for early retirement, financial independence, monte carlo simulation, and more.

Came across this tool on HackerNews last week and gave it a try and thought it was a really comprehensive (in my experience) tool for doing long term financial planning yourself.
It costs money, but you can even self host it for a certain price tier.