It can happen.
When you are doing work in your house, that might be the only opportunity to lay new cables for years. Even if you're not planning to use them right away. I had put in cat-5e in my house. But I only started using them a few years later. I had to attach plugs myself too. That was a bit messy. But after I bought a cheap cable tester (13 euros in a dutch webshop), it was a piece of cake.
BTW, I don't think a patch-panel is enough. With a patch-panel, all you do is connect wires 1-on-1. You probably want to connect them all into one single LAN. So you'll need a hub or a switch for that. If I were in your situation, I'd just attach RJ-45 plugs to all cables, and buy one cheap gigabit-ethernet switch. And just plug the cables into the switch. No patch-panel needed.