Looking to host a small on prem deployment (may expand that's why id like a i5) with V18 and want to be sure Would running the Debian IOS on this hardware be ok with our issue?
Intel NUC11 Tiger Canyon Pro Kit i5-1135G7 Mini PC Barebone Kit
The main thing to check is if the device supports Debian 10. If it does, the NUC you mentioned should have no problem running 3CX V18 (with regards to hardware).
Let me know if you have any questions over and above.