Working with bikes and the public is bloody hard work sometimes, small rewards but satisfying none-the-less. Although when it's going well it's a buzz, when problems arise it feels totally shit and you've gotta stay proffessional no matter what.
Work out if you can still do the job passionately in six months time and whether the 'buzz' for bikes will still be there. If it's yes then go for another try, I know of an instructor there, he says he loves the job but it is hard work and long hours...it is a service industry after all. The beauty of the posistion you're considering is that your skill level of riding will flourish to a much higher level, but can you off-set it against quality of life in other areas? I've found this out working with bikes, and don't really get much time for myself and more importantly time for my wife.
How green is the grass on the other side?