Hey Spiffy!
You've heard the downside, so I reckon you could use a little positive take. I worked the evening shift at my company for several years while operating a landscape maintenance service in the late 80's - early 90's. I mowed lawns, applied fertilizer and pesticides, aerated & over-seeded, tilled etc. I did extremely well, averaging 30K per year working 4-6 hours per day, 4 days per week most weeks, except during the fall when it was fescue over-seeding time in North Georgia, where I lived at the time. I operated about 8 months out of the year and took the winters off for the most part. I advertised a little here and there, even did a small bulk mailing once, but I got the most business from a little ad in the classified section of the Atlanta Journal. If my memory serves me, it was about $30.00 a month to run the ad. By my third year, I no longer needed the ad. In all those years, I only had one guy not pay me, and it was less than $50.00 that he owed me I just wrote it off that year’s tax and forgot about it. I found that most folks are honest and just want a good value for their money. I did carry liability insurance that cost me about $300 per year back then.
If you really have the desire to do this, then go for it! Understand the potential risks and rewards and make it happen. It is imminently doable and you can do it.