for senior position 28 K is less, i dont know what will be ur actual designation,
~if u r alone and no family and u only require a decent place to live a good studio aprtment will cost u around 2500 to 5500 QR (choice will be urs what type of accomodation u want)
~cars are available here (2nd hand) also ur choice what to buy, and secondly mostly companies in qatar provide transportaion atleast from work to home( iguess u shud ask them abt transportation)..for else qatar has taxis name of karwa (bit expensive to use daily)
~grocery for a single person for a month 2000QR are more than enough lavishly that i mean...
~job security is something very imp these days but as ealier it is said who knows what happens tomo ...this is something u have to decide...either relocate or stick to ur current job
~ hope i have helped u