Double hip replacement in future. So many questions.

I'm 69.
Not in serious pain but doctors don't know why I'm not.
I have multiple physical problems that I also have a high tolerance for.
Mainly, if moving "this way" hurts, I don't move that way.
My rheumatologist says I should wait until severe pain. I think by that time all the other problems will be worse, too. And mobility will be minimal, making recuperating slow if not impossible. That's why I think , since both hips are practically bone on bone and will get worse...do this while i can still get to and do PT.
Osteoarthritis
Rheumatoid arthritis (was in remission. tests last week say it's back)
Major arch tendon in right foot is torn and irreparable. Special orthodics are helping now, but cant walk far or fast.
Four lower back vertebrae are also bone on bone. One is slipped.
Right hand is in constant brace, thumb has to be kept stationary ... wrist has some bone on bone.
Also small stuff.
And it's just me. I have dogs I need to care for and it's 1 step into the house and 4 steps up to the kitchen, or 10 steps down to my bedroom and bathroom.
Starting with logistics, once I'm cleared from the hospital will I be able to use stairs? Use my house?
Help lift my senior, 28 lb dog?
Now I carry her down the stairs, seated on my butt, her on my lap.
How soon can I drive?
I want to get both done as the doc says both need it, but is it better in my situation to do one side at a time? Or am i equally out of commission either way?
I would love to talk with someone in my Southern NH area who's gone through all this or I will be adding carpal tunnel to my list of ailments just writing all this..
Thanks for any help.