Help me understand my hardware requirements

I am very much a noob to the technical nuances of UNRAID, VMs and hardware requirements. So I would greatly appreciate some help.

My old headless UNRAID NAS is showing signs of hardware failure. So I want to prepare for the worst by building a new system.

The current functions provided by UNRAID are as follows:

1. Immich Docker

2. Syncthing Docker

3. SMB shares

I run no VMs. In this system I have 5 drives connected to SATA ports (Four 3.5" HDDs and one 2.5" SSD Cache).

For the new system, I wish to combine the functions of UNRAID with my regular use Windows PC (i.e. run it as a VM). I would also like to try pfsense to improve the network capability of my home.

So the new machine must be able to house 5 SATA drives (from the original UNRAID system) plus two drives from my Windows PC (one m.2 drive and one SATA drive). Therefore the number of storage drives increases from 5 to 7.

For the motherboard I was considering some models from China, such as the Topton Mini ITX SOC motherboard with the capability of connecting 9 drives in the link below:

https://www.aliexpress.com/item/1005007081838288.html

A couple of questions about this motherboard.

1. Will I be able to use the iGPU for a Windows VM, or will I need to buy a seperate dGPU

2. The Audio port just says 2 in 1 Audio interface. Does this mean there is no audio hardware. Would a dGPU have onboard audio which I could use for my Windows VM?

3. Will I be able to make use of the NICs for a pfsense VM? (would UNRAID commandeer all four NIC ports?)

Also, would it be preferred to setup this system as Windows in an UNRAID VM container? Or would there be an alternative better method to set this system up?

Any help is much appreciated.