"Can't expect many hours per month!"
No but you can expect to get paid correctly and on time. Even more so in Karratha where the cost of living is so much higher than anywhere else.
As said this is a multi oil company long term contract. They pay a good standing charge for this aircraft and a good rate for what is an old and tired C550. Why then the trouble with paying correctly and on time?
Are Aspen/CAC still providing housing and vehicles?