Remember that many if not most states consider pulling a tube the same as a skier and require an observer when pulling one. I have a similar set up with 30hp on a 14' er and am sure I could pull a youngster at speeds close enough to keep then entertained by putting my lower pitch spare prop on and two adults on board. Never tried it but I thing it might be iffy with 3 adults.
Indeed I live in a state where a spotter is required. As it should be. I've thought about putting the 30hp ecu and intake mesh in place but it voids warranty. I would have bought 30hp except Suzuki doesn't make the DF30A in short shaft. So I have to make it if I want it
I have a 16Ft Star Craft "V" hull with a Evinrude E40 (non tiller).
Boat cruises at 28-30 MPH, in the Barnegat Bay (bit choppy).
I'm thinking it will pull a tube, but possibly make the boat a bit unstable...
My father had a 16' Lyman with a 35 hp johnson and we pulled two on skies many times ! And we had an observer as well as a driver!! I know the Holiday is a bit heavier than most aluminum boats of that length but, with the right setup it should pull a small riding toy. Your motor must be running at peak output, if it is weak, then your gonna have a problem
My opinion is your set up will be fine. It may not be a world class ski boat, but you know that already, but it should be fun regardless. And if it’s not quite exciting enough, then the tuber can do “tricks” like standing up, no hands, whatever you can think of. Should be a good time on the water.