Rasing the child with challanges

With 3 of my 4 boys currently facing issues ranging from ADHD,learning disabilites, and issues that require the use of various therepist’s ( speech, physical, occupational and behavior therepist). I have a somewhat of a difficult time with all that is going on…however I have also seen parents whose kids have way more issues/disabilities than any of mine. So how does a parent cope with all that is required when raising a kid with challanges? How do you feel it compares to your other kids? Do you feel your non challanged kid(s) get shorted in terms of attention because you are not having to focus on them as much? Does it create different sibling bonds or resentment?