Tonka's actually pretty well off in the money department, he didn't have much to buy for the over a century of working for a good company, and he is pulling in a retirement fund from said company, so he has a pretty cozy income that he's absolutely not telling anyone about.

As for the vorcha, they're levo by default, but as Bright pointed out, their biology allows them to go through one major metamorphosis in their lives to adapt to new and often extreme environments that would kill other species, but it's generally one of those things where their bodies can only change once in their lives to such an extent. 

As a side note, you guys are going to be the ones planning and organizing the attack and all the fucking around on Omega to keep our ship running, so have fun. ;D