Hosting people who are making me feel angry I have been hosting people in my home recently, and I felt uncomfortable because they were being a little lazy for the common chores and sometimes even greedy when we had to pay for goods (eg. food, gasoil, etc.) by not proposing any financial participation (I wasn't asking anything though, but they are far from being poor), even though I was accepting them in my own house for a whole week and taking them with my car here and there.

This was, considering my culture, a big disrespect not because I expected any money in return, but because the least they could've done is to show some gratitude. (Note : it is not the first time that this happens, we had them a few times and I felt the same way every time)

I spoke with my wife, who doesn't feel the same way, and told her I wouldn't invite them for such a long period anymore because I was afraid this might eventually take my patience to its limits and consequently provoke the end of this friendship. I'd rather spend nice evenings with them or even weekends from time to time, but nothing more than that.

I feel guilty for making my wife sad by not accepting those people that aren't being harmful objectively and that we really like, but doesn't the Noble Eight-fold Path specifies that one should avoid bad thoughts by cutting the source of them ?

Did I do the right thing or am I overreacting there ?
This is my personal favorite. I have had this happen so many times although the victim was my mother who had to do a lot of things and I contributed a bit in a constructive fashion. This seems to be a fairly common case experienced by many hospitable people. 

So the deal here is that I would not worry what the noble eight fold path says or whatever. This is rather general i.e., in terms of how best to deal with things that happen. It is about the choices you make and consequence you receive. There are lots of options to consider and each one would have a consequence. But without hurting others, (although I wouldn't mind giving the guests a piece of my mind), choose the best and most congenial option available. Sometimes it may be best to go out or do something else wherein you are busy. 

Funny thing is they know they are being unhelpful too. But they still stick around. You could employ the tactic of asking for help when and if you need it. 

There is nothing wrong with being practical about such matters. But know that you always deserved everything that came to you. Feeling something about it, either positive or negative, makes no difference to the matter. This is a little hard to take. 
I am not asking you not to feel guilty or angry but know that when it comes, it is pointless to act on a whim. There are other ways to deal with the matter. 

One other important thing is that, trying to satisfy other people is not your problem. You can treat/guide them to an extent. And in the world I have observed that no matter what you do you will be criticized in some way. Even Jesus was criticized. Buddha has been criticized. It's important how they took it. Because they were in total control of how they reacted. 

Again I am not perfect and nobody is, and sometimes I get irritated too. But being practical and working on distancing yourself from emotions is important. The rest is how you conduct yourself.