Lawn mowing (and landscaping, irrigation, etc.) is my business for 40+ years. All of the above comments are useful. I would add that your trustworthy equipment that you brought with you from up north will fail within weeks. That stuff is designed to mow your own lawn for maybe an hour at a time... 2-4 hours a month. Pick up some extra work and start running 20 hours a week and you will need commercial equipment. Google 21" Toro Commercial lawn mower. It's $1900.
2022 Toro Heavy Duty 21" (53 cm) Self-Propelled (22295) TO222951581-004 | Four Brother's Outdoor Power