I think it's more difficult to retire for a business owner than the more typical "w*rker bee." Your own business is much more personally invested than a "job." I am sort of both in that I used to w*rk for a Megacorp and also own a (very) small business. My "worst" year, I was w*rking 60 hours a week at Megacorp and up to 30 hours a week at the small business (relatively short time or I would not be here.)
Passing the bidness to someone else takes a certain ability to "quit" mentally as well as physically. DW and I were able to do that, even though the business was a part of my life from the time I can remember (parents started it and passed it to us.)
One piece of free advise (and you know what that's worth): We (and especially parents) found it much easier to get into business than to get out of it. Parents all but "gave" the business to DW and me because they could not sell it for anything close to what they perceived its value to be. We found the same issue when the time came, but were finally able to extricate ourselves by selling on contract. It's tricky, but it has worked.
So I was FI at 51 but waited to 58 to retire because (INTJ's, stop reading now) I still enjoyed my Megacorp j*b. When I didn't, I pulled the plug over a long weekend. I really think it is a matter of doing what you want with your life. If w*rking or owning a business is more fulfilling than FIRE, then don't second guess your decision. Just be alert to the changes you are experiencing so that you will be aware of when it is time to make the transition from w*rk (however you define that) to retirement. As always, YMMV.