What are some financial military benefits that I will be entitled to if I sign on?

IIRC, you can use you're 11b to get free/subsidized medical at most govt hospitals and polyclinics.

There is also the SAF group insurance but I'm not sure what that covers. It will stop when you leave the force.

Depending on whether you sign on for the wospec or officer scheme, you will either get a large sign on bonus or a higher monthly salary. Not sure how the DXO works cause it has raks equivalent to both.

You also won't have to spend money on clothes since you'll be wearing uniform!