An alternative to Zoho which is free and potentially you can run on your existing servers is nubuilder
We asked Grok AI ... How would you explain nuBuilder to a computer programmer called Tyler D. and why would he find it useful as a person who creates simple applications like an invoicing app or a complex ERP? Grok's answer... Hey Tyler D., let me introduce you to nuBuilder Forte—a tool that’s
www.nubuilder.com
For people who already have the following
a) cloud provider offering access to cpanel that has file manager
b) cloud provider offering similar access to file manager
c) cloud provider offering access to phpmyadmin
e) cloud provider offering additional subdomains
You can be up and running with a development environment in about 1/2 an hour probably for free
I would definitely recommend people taking a look
And here's a link to my personal instructions on how to get the development environment up and running