I see the problem as an out-of-combat healing issue, so maybe you could add something like this instead of carrying around 6 wands.
Halkar’s Handy Healer’s Kit
In addition to the contents a normal Healer’s Kit provides, this enchanted chest allows for skilled hands to maximize their healing potential. The user may announce a Heal DC check between 5 and 30 and roll accordingly. If successful, one target gains that number of hit points. The kit contains enough supplies for 10 uses per day and is magically replenished and restocked at dawn.
Add some arbitrary upkeep costs if you want.
Also, Healing Belts are cool because they allow everyone to be responsible for combat healing.