Interesting.
It's only me plus one but i find the admin a pain. I have to sort water, recharge van and reel batteries, reconcile payments, print work off etc.
I know you have to do more.
FHowever, my latest pro tank install does seem to have stopped a lot of the constant fixing i used to have to do.Your vans look pretty neat and i would expect reliability to come from robust systems.
That's why people have IONICS .(I haven't got one i'm just saying).
I do tend to buy back up pumps and reels etc, so if something goes a quick switch can be affected.This is a waste of money, but these things have been used, and turned out to be purchases i would have had to make anyway.
From comments you have made in the past, your approach is either shrewd at keeping costs down or penny pinching.I find spending more works better.
As you know i have a m/trading background, and nothing winds me up more than people having seventy grand range rovers and mercs (i'm talking about a husband and wife i know) and the biz- a catering trailer is a fifteen year old dirty heap.
That doesn't really have that much relevance, but my point is that improvements can always be made and there are still probably things that can be learned off this forum to make our lives easier.