Of course, you should move OP. It sounds like it'd be wonderful for all of you. I mean, I wouldn't move like three doors away. That'd be too suffocating. But within 5 miles for sure. As some posters have said though, make sure you have your own life and hobbies, and don't suffocate your DC and grandchildren. Your daughter in law's parents feeling butthurt, and like their nose has been put out of joint because you're closer and may see the grandchildren a bit more isn't your problem to deal with.
My older daughter and her husband actually live 10 minutes walk away from his parents and they see them 2 or 3 times a week some weeks. (Well, he does. She probably sees them once a week at the weekend with him.) Sometimes his parents go to DD and her DH, and sometimes they go to them ...
Yet they visit us every 4-5 weeks - and we visit in between, so we see them every 2-3 weeks . Whilst I wish I could see her a little bit more. I don't feel resentful that the other parents see her more. If grandchildren were involved and they were seeing the grandchildren 2 or 3 times a week, and I was seeing them less (like only every 2-3 weeks,) I may feel a bit differently.
My older daughter lives 25 miles away, and the younger one 18 miles away. They live 7 miles from each other... I see DD2 once every 2-3 weeks. She only visits every 5-6 weeks even though she lives a bit closer. (We visit her in between too.) They are very busy young professional women, and I have my own life/friends/hobbies (and so does DH,) so we don't mind. Every 2-3 months we all meet up together at our place. DH, me, both DD, and their partners.
I can honestly see now that I'm getting on a bit (nearly 60,) myself and my DH both moving to be closer to them too - like 3-5 miles away. Maybe in 3-4 years... 17 to 25 miles is starting to become a little bit far away for me, and DH. But yeah, the insecurities from the other grandparents isn't your problem. If you're able to move close to them and you're all in agreement with it. Absolutely do it.
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