I hear you! But I also forgot to mention some technical issues, not in the least the fact that my switch is also downstairs in my technical room. This means I would have to have not only an "uplink" ethernet cable to the room, but also a "downlink" cable to my switch. And I've only got one ethernet cable running to that room.
I'm guessing I could also use a small intelligent switch and use two VLANs for that, but would end up costing me more than the 45 euro that TP-link router is going to cost me. And it's a far less elegant solution.