A twin set up with two pipes etc is going to cost more than a single QD 25 and hot pipe.
The twin set up with the added coupler weight and twin pipes out weighs the single QD.
Again, I am just starting out with boats and I love the big cats.
If this is the case then twins and QDs are a definate no no, you should learn to build, operate and maintain on something easier than either of the above choices.