I do that all the time. A thing is a thing, and it can be your thing now. I only try to ask myself two things:
- Do I really need that?
- Is it in a good condition? I have a lot of used stuff at home, so if I took something half-broken, it would look like a dumpster already.
Sidenote: I live in Denmark, where people overconsume, and then get rid of stuff which is still in good condition.
You should definitely play both Crusader Kings and Dwarf Fortress - the feeling that you get when you read it: "Hah, it feels like in real life but damn it's crazy" Is true for gameplay of both games in general. When things are simulated with enough details, stories appear!