Job offer (Riyadh)

Hello everyone

I need your help

I have been offered a job at the saudi national guard hospital. Salary is Protected content . Plus 400sar travel allowance, and a max of 20,000 sar housing allowance.

I will eventually bring my family over ( a 2 yr old and a 6 month old, both girls )

So I'm sure you all know what I'm Going to ask, yeap is it enough?
What are the rents like
Can i lease a car (im in london so car expense is through the roof)
Whats it like for families
My job role is that of medical technologist 1. Does anyone know if the package offered for this role us a good one?

And really anything else you all think i need to know but haven't asked because i havnt lived there.

Much appreciated

Zeshan