I'm looking for a dock that will allow my gf and I to connect 2 HDMI monitors and 2 USB mouse/keyboard devices to both a Macbook Air (2015) with thunderbolt 2 and a modern dell laptop with thunderbolt 3. The laptops would not be connected at the same time, I just want the capability to dock either one. Also charging capability for the laptop would be ideal, although I'm aware this probably might not be possible with the macbook over thunderbolt 2 -> 3 conversion.
My thought was to buy a dock that supports tb3, for the dell and then use a tb2 -> tb3 adapter to connect the macbook to the dock.
Something like this:
Macbook (TB 2) ---> Converter (tb2 -> tb3) -----> TB3 Dock
Dell TB3 (TB3) ----> TB3 Dock
Would this even work? What would be our cheapest option here?