If you hate the job that much... then go for it.
Sometimes, the job you've hated can be something you miss, when the novelty wears off about window cleaning. I know I've had a good few low points with window cleaning over the past 9 years, and I'll probably have another few too.
Just wait till winter, when we have a third tough one in a row, everything's frozen up and you've got two big ice-cubes; one in the van, and one in your holding tank, and you're watching your savings getting depleted 'cos you've got to spend it on boring stuff, like gas, electricity, and food 'n' stuff; and you're kicking your heels going stir crazy, yet you've still got another couple of months of winter ahead.
It's not all fun, but that's life for you!