First,this is your opinion and this is your choice with whom to live. But here I would suggest you that as being the only son you should take the responsibility of your parents.  They are now old and nobody is there for them, they will be having few expectations from your side as well. So better accomplish them and let your wife know that your parents are as equally important as your in-laws. You can say her that she can visit her home once in a month and you will take her to the parents house. But leaving my parents here alone is a bad idea and you won’t agree.