I use an MPV - Renault Grand Scenic - Petrol - and have for the last 10 years (not the same one all that time!).
It was a case of either buy a small van and run two mediocre vehicles, or buy a reasonable spec MPV for both private and work use. Finanically, I just bill my company 45p/mile used for work (HMRC rate, not increased in the 10 years).
I keep some stuff (low value tools, some materials) in the covered section behind the middle seats (rarely need the 3rd row seats), and load anything else as/required for the day. It costs me a few minutes each morning/evening to load/unload, but I'm backed onto the garage, and not a big deal.
I can fit small 3-step ladder across in the back section. Larger ladders go on the roof bars as/when needed.
Obviously the MPV has to be insured for business use.
I used to worry it looked less professional, but if asked I explain it saves my van being done over, and as most of my work now is by recommendation, not an issue.
I thought I'd try it and see, and it has worked for me so never changed.