The transfer fee is off the cap and should more aptly be called compensation.
Parra have a stack of cap room as Brown is already on a pretty penny (about $800k as per a few parra supporter mates) and lost RCG, and Gutherson last year, who they haven't really been replaced.
As far as the dogs go, I can't see how they'd have any cap room. The players they've bought in the last 3 years would have been at overs, as when they started re-building they were just as shit as we have been the last 3 years. However, Laundy and his pub empire would have unlimited resources. I'd say his income from all his pubs would be just as much, or more, than what parra leagues takes in.