Lots to consider ........................
Safety, durability, functionality, popularity, price and probably in that order.
You don't want to be worried about taking your eyes off your customers all day in case they take a dunking, you don't want the tubes to fall to bits because they are not up to commercial use, you want the tubes to perform well and have all the bells and whistles, you want your customers to enjoy using them and wish to return another day for another go .... and you don't want the cost to rule the sport out.
The only problem with buying good quality gear, as with so many things in life ..... is that a proportion of your customers won't look after it
but I think you'll find that this is not too much of a problem with Haddo regulars.
In my experience, two good quality tubes will be far more useful than four cheaper alternatives, so just take things a step at a time
Somebody posted something about some nice ones that were coming from Spain recently, but I can't remember where I saw it. I'll try and find it.
Cheers
Mike