Interesting idea... we take for granted here the essential utility of basic machines actually changed the world when they came about in the last century.
Just like old roommates I used to have losing their jobs because they didn't have bus-fare... it's hard to make clothes for money if you don't have a sewing machine.
This is an idea so straighforward I'm not surprised no one has though of it before.
Cheers,
David
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LW
 
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