The easiest business would be to become a mobile notary, nanny or dog sitter.
Construction is lucrative. So is plumbing and painting. Or you can try to make a pet supply store. My friend made two pet stores, had an exit of 7 figures on each.
Originally posted on Quora.
Leonard Kim consults startups and writes books like The Etiquette of Social Media: How to Connect and Respond to Others in the World of Social Media