My town has an abundance of yard work entrepreneurs. A sizeable proportion of those are part of the "underground economy". Anyone can also call up various organizations and have temporary labor sent out to them to do whatever. Around here, door-to-door solicitors are not looked on with favor, being widely regarded as pests and scammers. Mailers, doorknob flyers and local online websites (nextdoor.com, craigslist.org, facebook marketplace, etc.) are preferred here to advertise gardening services. I would wager that the great majority of run-down yards/gardens in my neighborhood are that way because the current residents/owners have no interest in such things or cannot perform and/or cannot afford help for the required tasks.
