i went from using a small van for 15 years direct, to using a car as a van when i went subbie instead.
much nicer to drive long distances...
for 15 years i hauled around everything including the kitchen sink and never used half of it.
admittedly a domestic plumber/ spark jobbing around a small area, needs to carry every tool and a wide selection of parts.
but as a commercial installer your jobs are booked in.... you know what tools you're going to need/load up for the day, and can have the parts delivered to site.
at a push you can always hire large items for the rare times you need them unexpectedly.
but a tesla....
would have been no good for me in my day... having covered up to 2000 miles in a week occasionally...
southhampton one day, newcastle the next, then flint in wales, then over the norwich....