Dolphins are already set up have a team, system normal. No finding a team, no shipping players off and training somewhere and having staff for them.
Broncos have to do all that and wait for the QRL to have a new team which they're going commit to running and want to run.
Dolphins have it good to go, that's why I would say one team suits them and is by far the most sensible option.
If they shipped their top 30 off it would just strengthen other teams to then potentially beat the Dolphins that doesn't strengthen your brand- and you'd still then have to find 30 ISC players for the Dolphins.
Using the 12-13 not in your NRL team to play ISC and having your development players make up your 17 in the ISC and if they're winning and progressing up and down to the NRL looks good for them.
That's why I am sceptical of this deal with the Capras- I bet it's all one way traffic- CQ's best coming down here and playing for the Dolphins no Dolphin will be swimming the other way.