A lot of old cars are poorly maintained, especially mechanical brakes, which most don't understand well enough to rebuild/bring back to original tolerances.
Once done however, they stop very well, and very fast.
My roadster has mechanical brakes, and stops well.
Once you add a heavy trailer though, it only makes sense to have trailer brakes, which I do.
A 6 volt brake controller allows the trailer to handle all the stopping needs for the combination.
Rob
Waiting for "someday" will leave you on your deathbed wondering why you didn't just rearrange your priorities and enjoy the time you had, instead of waiting for a "better" time to come along...