CFII ACFII HELICOPTER left out one part.... cost.
You'll be repeating lessons, which adds to cost, but there is also the milking that you will get. Every instructor will have the opportunity to say that you are not good enough at skill X, or that a previous instructor didn't teach you thoroughly, or [insert excuse to charge you for more flight hours].
Also, every time you change location you will also be learning new landmarks. Jim Bob CFI only does his training out over the trash dump. You learn where the trash dump is, and the landmarks for how that CFI likes to see your maneuvers done. You move. Now Timmy CFI does his training over the 747 scrap yard. You have to learn that location, and the landmarks for how that CFI likes to see your maneuvers done.
What if you're training in a Schweizer and you go to an area where you can only find Robbies? Now you're back at square one. Or 1.5. Gotta learn how to wiggle the T-bar just right. Gotta learn how to enter an autorotation in 6.5 nanoseconds. Etc.
But you gotta do what you gotta do in order to enter the super awesome ranks of helicopter pilots. Women will swoon. Jet pilots will envy your mastery of 3D flight. Collection departments will have you on speed dial. News crews will park in front of your house so they have the scoop on the latest rescue call. You will be able to fart rainbows and pixie dust. Jesus will be your golfing buddy.
Good luck. We need people to fill the pilot shortage gap.