The first two Juki machines are needle feed machines for sewing apparel, and the last one is an overlock machine, which is a specialty machine which would not work at all for sewing car interiors.
The Singer 188 is also a needle feed machine for garment work, and the 20U33 is a zig zag machine.
None of these machines are what you need for car interior work. You should look for an industrial, single needle, lockstitch, compound feed, walking foot machine preferably with reverse.
No one lives forever, the trick is creating something that will.