I am looking at decent PM tool myself. To the point that I am entertaining the idea to do it myself as a side project. Reason I am not using any of available of

I am looking at decent PM tool myself. To the point that I am entertaining the idea to do it myself as a side project. Reason I am not using any of available offering is simple: unless someone puts a gun to my head I never buy software that does not have perpetual license and that can not be hosted on my own premises. I found some piece of software that I can host and it gets me limping along but not very happy with it. I am more than willing to pay for license and for upgrades (when I feel I need those) but as much as possible I absolutely refuse to become a hostage of multiple different companies holding my data and extracting monthly rent.