Modified washing machine - yes!
For crush & strain, I'd thought about a modified wine press.
A friend developed a special machine to remove commercial glued-down carpet. He started with a self-propelled lawn mower and rebuilt it. When he had it right, he sold the design. Mechanical engineers, out there...? Washing machines and wine presses are waiting for your expertise!
Re: pickup truck as vehicle for 1000 hives. In US, yes.
In most countries on the planet, a cargo van or minibus with a screen to keep bees in the back would be better.
This, because of the need to safely move people, protect cargo from billowing dust on unpaved roads, toxic vehicle exhaust (no catalytic converters), theft at intersections, insect attacks, and weather problems. In the west African continent there's a dust storm for many months called Harmattan, which daily deposits a seemingly large amount of the Saharan desert into your tightly closed-up house. Elsewhere, day-to-day realities include torrential rains, subzero temps, or heat that can melt wax. Yet beekeeping can happen there, with the right setup.
In crush & strain v. extracting, a few of the factors to consider are:
Is cut comb honey worth more? Can it be processed fast enough to avoid fermentation?
How much more bee-labor is involved, if flow time is short (comb building) and keeper does not feed?
How much more people-labor is involved, to crush and filter, and clean inevitable clogs?
What can be done about high water content, if there is no spin time to regulate percentage?
How much is the investment for extraction tools?
And, a question on these hypothetical 1000 hives presents itself: whether large-scale livestock farms with seasonal employees are really more efficient than small-scale farmers who are financially and emotionally invested in their own success: a variation on the "teach a man to fish" idea.