I have a few questions about mowing yards?

Alright so im from corpus christi and im 13 yrs old,and i wanna make some good cash and im a hardworker.So i thought about mowing yards and such on the southside where one or two friends of mine used to cut yards and they use to make money!But i had a few questions like should i take my own lawn mower or should i go house to house with a tank of gas offering to cut yards please answer asap cause i wanna start tommororw but i wanna know whats best!