I'm thinking of revisiting this idea again... with THIS guy! https://mikrotik.com/product/crs305_1g_4s_in
An affordable ~130 USD 10Gbps switch! Downside it's that it's only 4x10Gbps ports and it seems to be a pain to get? (not easily accessible) and you'll have to use SFP+ cables which may require specific brands (i.e. devices in the chain may only like specific brands, like cisco only working with cisco cables, from what I've heard).
Also that guy can do PoE if you have a supporting device! Now I need to plan my setup, as I need a thunderbolt 2 to SFP+ network adapter as well for this entire thing to work