1960/1961 P142/P641C

The washer tub looks immaculate, very low use and properly loaded.

Fairly rare these days, they are TOL. The washer tub is very small by todays standard, the dryer is timed dry only. I'd hold out for a newer suds washer 1969+ with a bigger tub.

Cabinet dimensions or tub/drum dimensions?

I’m guessing the dryer specifically is the problem child….?

Negative, dryers are simpler designs and generally outlast washers in most cases. Even the with the reliability/simplicity of Maytag helical washers, these dryers can easily outlast the washers. For long life use, the dryer needs to be torn down, drum, blower, and pulley bearings oiled. Probably still has the original round style motor that can be disassembled and lubricated. Probably need a new front seal glued into place. New belts are a good idea. After those are taken care of, the running gear will be fine for at least a couple of decades. I'd locate a spare timer for the future.

The washer will need an extensive teardown and rebuild for reliable daily use. The trans oil is broken down molasses at this point....or what's left of it. It isn't lubricating anything at this point. The lower seal will immeadilty start leaking if it hasn't already. New stem and boot seal along with a tub bearings will need to be done. The triangular seal will need to be replaced at that age. All hoses will need to be replaced. Probably could get away without replacing the damper pads by lubricating them with gear oil  if they're still fine (they probably are with that low mileage). Will need belts. The washer may predate the motor carriage design depending if it was built in '60 or '61. I'd replace the pump if it's the original metal one that likes to corrode and fall apart. I wouldn't put any trust into the original water valve and those are getting extremely difficult to find now.

These older washers/dryers are for the enthusiast who likes to get dirty and restore machines, not for those who want to just do laundry.