I don't know how much they are willing to give Api, but I doubt it will be much more. When the current incumbent NSW hooker is getting 750k at the Roosters, 600k is a lot for a still unproven kid, and Latu and Sullivan are halves, so they will naturally get paid more.
Chammas said on his podcast that TDS's agent has been asking for 600k from clubs to sign him, which is a ridiculous amount for him at the moment. The only team that would be willing to offer him that sort of money is the new Perth team.
Api going to Perth doesn't make sense. One of the main reasons he joined the Tigers over the Dolphins back in 2023 was because he wanted to stay in Sydney to be closer to his aging parents and because he has a young family. Why would he now move across the country to Perth?