It was a big risk for them why because then did not know much because of there culture
Because the united states believed that it was its well... "destiny" to go out in the world or at least west, and take what ever land was there, as the united states was the great liberator for the people who wanted to be free- so it was its destiny to grow its borders, anyways, this made adapting new states into the union almost policy and the united states was eager to add more land and territory to its borders.
Enough power so that it could have and sustain a legislative body, the main governing body, a judge court, the military body.
PLUS:
taxes: funds for the gov't
obeying laws: gov't will receive more power over people if they obey (and money)
