Heard of the expression two heads are better than one.
In your case it sounds like one head with a brain would be
better.
I had this (although not as bad) with my aunt with different people not
knowing what was going on and saying different things or making
different arrangements.
Regarding the equipment at home, even though John is in rehab, you
might be better to arrange the delivery of the equipment as soon as
possible. At least it will be in place for when he does go home.
Otherwise you may find he gets delayed longer in rehab than
necessary.
Im not sure how quickly equipment can be delivered to you in your
neck of the woods, but it took 6 weeks to get the promised
hospital bed delivered for my Aunt. I was even given two different
delivery dates before it finally arrived. The Occupational Therapist
kept changing her mind about the type of bed and cancelling the
arrangements at the last minute.
So it might be helpful to make some enquirers as to how long it will
actually take to have the equipment delivered. If it is going to be a
matter of weeks, then you can delay getting it for a while. If it
will be months then you might need to consider getting things
in place while John is still in rehab.
Continuing to pray for you both.