Re: the Inlaws
It looks like their "rotation" intention between the son's is going to be a long term arrangement..........so the only option for you is to TALK TALK TALK TALK...not just you/hubby and them, but also the other sons...and come to some sort of arrangement whereby their stays with you are scheduled and that they understand that whilst you don't mind them staying, they need to build their lives around you..................
Good luck...I know it's easy for us to give advice.....at the end of the day...you're the one in the predicament.