Combo box (Ryzen 7 3700x + RX 5700XT)

Hello all,

I would like to ask you about special build. Currently I have main desktop where I am using it time to time when I need to do something (Photoshop and Lightroom) and sometime to play games. Also on my equipment I have NUC as proxmox server for home assistant.

Now I would like to expend my system about NAS server but here is a question. Make it sense to switch main PC to combo box where I will create nas inside it and sporadic PC to do my job done as windows VM? Migrate all content from NUC to the server and connect it to the monitor as to be able to connect to VM over it? Or it is better to buy some used parts from servers and create separate device?

Main PC:
Ryzen 7 3700x
MSI B450 Gaming plus
Radeon RX 5700XT

If some changes will be needed of course I will do.

I will be appropriate for any help

Best Regards