Have you given up your dream for your dream job?
agazso: If it is your dream job why don't you accept the offer? If you don't like it, you can still start your own business after a year or later (I don't know how old you are).If you like it, you can also start you own business, maybe a bit later, but with enough experience and an established partnership behind your back, if the two is not competing with each other.