im just about the end of my tether with window cleaning its just one big ball ache I have 300 custys and a new ish fully fitted 350 ltr hot wash system its a good round I'm just not botherd any more
Flog the lot Dave!
If you can get £20,000 for it I would suggest investing the proceeds in a 'garden grow'. Here's how it works....
Rent a JCB to excavate a decent sized hole in your back garden.
Buy shipping container to plop in the aforementioned hole.
Wire the leccy to the nearest streetlamp.
Purchase some water related equipment (hydroponics I think they're called).
Grow some TOMATO plants or mebbe CHILLI plants.
Lots of plant food, remember to flush the nutrients out before you retail no one wants it left in, staining on the glass and all that.
Find a wholesale dealer to shift your produce.
Sit back and enjoy your retirement. Simples .
Drawbacks might include no back garden but other than that can't see any problems.
HTH