i am in the exact same boat with you! im a single mommy to 1 1/2 year old...and man just doing the pre-reqs seems hard!!! i think you should just follow your dreams and like the other posters said...by the time you actually attend nursing school you might be in a different position...anything can happen between that time!
i would so do it..thats why im currently finishing my pre-reqs and hopefully by the time we graduate the job market will be alot better!
good luck! :)