I would highly recommend a good switch/router for your equipment. Do a stand alone setup as if the hotel wouldn't be there and make everything work. If the switch is unmanaged you would need a router for DHCP and routes to the internet and such. Switches are layer 2 and have no idea about IP addresses, routes etc. For switches make sure the switching bandwidth is providing full bandwidth concurrently on all ports. An 8 port 1G switch would need a switching capacity of 8x 1G in and 8x 1G out. So 16G switching capacity.
With managed switches you would want to setup VLANs or multicast for different sort of traffic. NDI, Dante..... Apply a DHCP on the VLAN and create a route to all VLANs so you have internet from the router not only on VLAN1.
Think about your setup in full load. A 1G link can manage 4 Full NDI feeds. If you add more feeds switch to HX or a higher speed link.
I have very good experiences with Mikrotik and Netgear Equipment.
A special focus need to be on the hotel connection. They are usually very poor, unstable and very unreliable, especially at low load (during setup and test) and the event (many people high load) itself. Always have a plan B in terms of external internet connections that ideally are bonded with the hotel one.

Also if I was specifying a system now from new, I would ensure the Vmix PC had at a minimum dual 1G ethernet or at least one 2.5G Ethernet (and make sure the switch supported 2.5G on some ports). 10G Ethernet is getting much lower cost and switches with one or two 10G SFP are quite reasonable (e.g. Zyxel XGS1210-12 or with POE Zyxel XMG1915-10EP, note I've not tried those personally)

Regards,
Mark Leman