Hi Sir,
This topic was raised recently and currently there are few options available at different prices:
MMoweb - Most popuplar account panel with all features , but unfortantly doesn't have support for the last 2 years and some issues raising.Currently available additional API for it as
Extender fork
Total price : MMoweb 25$/Monthly + Extender Fork 65$/Sign up (subscription for 6months ) +10$/month(after 6 months)
First month =
90$
WizardCp - Account panel from Unsimple group , reviews are quite mixed but some big projects are using it. Only what can I add that currently this studio has bad reputation and even was banned from some big developers forums. But Its your own decision to try or not.
Price =
499$ (one payment only)
Sphereweb - New account panel design by Logan was free version before but now in Version 2 ( with API resting outside ) has a subscription . Big plus that has good community and still a lot features still adding and also Massive plus that has web build updater with good compresing.
Price = 11.5$ /month( On free version difference that only 20 accounts registration limit for day / thats all )
Lin2Web - Account panel as it is ( demo available ) Never used so unable to tell anything about it.
Price =
250$ (one payment only)
L2CMS - Account panel which was developed recently and currently on sale with a massive line in order . Still waiting for result, so currently unable to give feedback.
Price = 250$ (one payment only)
In general to create Website and account panel is not problem , problem starting if you plan to attach automatic donate system.
If you have good knowledgeldge in PHP you can try to build yours own one on
Lavarel
Hope that helps.
PS I am aware there is still some old CMS but trying just give the most modern options .xD