You know the family of those always occupied children get at 2,3,4,5,6 and 7? Kids chat can't independently play, who can't play on their own, that always needs an adult doing something with them. PS I couldn't walk for 9 months after my birth (full recovery was 18m) no just popping out for me or driving and you know what? My son is a happy little boy! He independently plays and others get really jealous! It's absolutely a balance, quiet time is absolutely essential for brain development as much as stimulation is. And it's ok for children to learn to be bored and to come up with stuff with their imagination and not just parents deciding. You're doing great! It sounds like you have a husband problem rather than a parenting one.
I think fresh air every day even for a short time is really important, but if you have a garden and a good playspace at home there’s no need to be somewhere else every day! It will cost you just going out so it will definitely save money too. Tell him to look after him for two weeks straight before he judges.
Does he work from home ? It sounds like he’s spending too much time at home and needs to go out to get some work done so you can do what you need to do at home with your boy x You need need to make a plan with him that works for you both it’s not his way or the high way compromise is key in relationships and he has to meet you half way