I would say that FileMaker is the way to go.
If that is already too expensive for you, you don't have many alternatives:
You can buy a SaaS product... but you said that it was not the right pattern ...
An asset management system that you could try out, even though more popular for IT assets is Snipe-IT.
There is an open source version.
It can run on a webserver, so users and login via devices.