Agree with the last few posts. $5,000 can buy you a few extra weeks on the road if you decide to venture beyond Darwin. A trip to Broome with stops through the NT will cost about that in fuel and cash flow while waiting for an income.
Presuming you completed the CPL and IR fairly recently? Was it an MECIR? If so, I’m reasonably confident the performance and complexities of your light twin will be comparable to that of a C210 or C206.
I would be using the $5K if after 6 months I hadn’t got a job and needed to get current again. Or if a renewal was due in the next 6 months.
That’s something for you to weigh up. I have every confidence that Flight Standards in Darwin will give you the right guidance and advice regarding when to invest your money. Although I haven’t used the school, I have been put through my paces by Cameron and am all the better for it.