A stadium is definitely an issue in Brisbane.
The Convention centre is an ideal location, but is too small to be a long term option if the team is a success. It's about 4000, maybe a little more if you really squeeze in the temp baseline stand and floor seats. In the Groves days, they had the issue of only usually half to 3/4 filling it, but you couldn't really spend marketing money to fill the rest, as the return on those seats would be minimal. Plus it is VERY expensive, run like a profit slaughterhouse by AEG Ogden. They keep all the F&B profit (and do a shitty job of it) plus you have to lease every piece of equipment each game night at ridiculous rates, right down to the paperclips. The Netball team wants to leave because of expense. If you were able to get the rates down and fill it, then jack up the ticket prices, it could be viable. Centre of town is what the NBA does, for good reason.
The tennis centre has neighbourhood 'event limit' issues, and is not a sealed venue, there's few actual walls. It could be viable with legislation & building changes. But it's a bit better capacity at 5,500 and is close to a train line.
Chandler is old, small and imho not viable. It's in a terrible part of town with no public transport too.
Boondall is the biggest by far. Although it's on the outskirts of town, there is a train line, plenty of parking and people are familiar with it. And it's a great venue with permanent practise courts and a basketball association. It would make sense not just as the game venue, but as the home base/training centre too. The statue of Leroy is out the front and the halls have plenty of old bullets singlets on the walls. It's issue is also expense and it is run by AEG as well. There'd also be some juggling of game dates in between concerts etc but that is an issue at any building.
Realistically, any Bullets bid needs to be aiming to either play at Boondall or team up with the netball Firebirds & Queensland tennis to make Pat Rafter Arena viable as a specialist court sports venue and move Leroy's statue over there.