Exterior rear doors storage ideas?

[Nuubie]

Using my '24 Entegra Arc for a mobile acupuncture clinic...seeking ideas to stow a folding zero-gravity chair on exterior of rear door. Money IS an object. Thoughts? thx!

 

[MemoriesByTheMile]

If it a chair that you want customers to use, do you really want it outside in the elements getting wet/dirty in the draft at the rear of the vehicle?
Why not stash it inside while traveling?

 

[Kevin D Pem]

If it a chair that you want customers to use, do you really want it outside in the elements getting wet/dirty in the draft at the rear of the vehicle?
Why not stash it inside while traveling?

I was thinking that!

Personally I don't hang things on the doors. I feel adding weight is like hanging on them or worse considering the bouncing going on!