Dev env VS a plain HA with caching disabled?

I wanted to start developing my own card for a specific use that i cant find any other card that fulfills.

So i went through the documentation for frontend development and honestly think its a bit of a hassle to setup.

I need the setup to be contactable through my LAN as the device I’m making the card for is sending data to HA directly.

Is there anything wrong in just setting up a new proxmox virtual machine alongside my already existing home assistant proxmox virtual machine, where i just disable caching? Seems a lot easier to do this, than what the documentation suggests, with forking the core, then the frontend, devcontainers and mounts etc.

To develop a custom card? You are likely not following the proper guide.