I am a very short adult (61 inches; 155cm), who has not been able to get the hang of sliding off the seat and back on at stops (especially on hills). I really just want to be able to stop and touch the ground with the balls of both feet, but I do understand that on a regular bike, you can't do this and have the seat at the right height for pedaling.
Could I solve this situation by buying a children's bike, and then adjusting the seat up really high? It seems like with smaller wheels (maybe 24"), the part the pedals mount to at the center should be closer to the ground, so there will be less of a difference between "leg distance touching ground" and "leg distance at bottom of pedaling". Could this solution work?
Also, are there other solutions in the a-broke-student-could-buy-this-on-Craigslist price range that I should consider? (Something with gear shifting, my commute involves a big hill.)