accepting what i have vs. making plans for better future - good or bad?

i saw an answer here that i liked: >... > Of course we have all these grand ideas about the great business we > want to open, or the great way we could help people, or other visions > of great success - but they are only projections of thought into the > future. This projection creates a mismatch between "here" and "there". > From this mismatch comes dukkha, the feeling of wrongness. > > Instead, for any success you will have achieved, there must be a > pathway from where you are now, to there, with the first step being > within reach. Therefore the only way to get there is to work with what > you have right here and now. So do your best with what life gives you > at every given moment ... i have a job i don't like - it hurts my legs because of long standing time - and i was thinking about other career paths... of ways i can earn money and leave this job - like starting a private business - but in light of the above answer, is it a bad idea to think about this, from Buddhism perspective? i would really like to know your thoughts on this: should i stop and just work without thinking about a better job / a private business?