if you follow bluemountain advise, definitely you lose because most of the price of his advise are not the actual cost.

a room with a 2 bedroom will cost only around 4k to 5k.
water and electricity including internet cost 300-500 riyals.
foods definitely depend on you on how you eat.
and most of all, you are not buying mobile phones every month.
why rent a car worth 2500 per month wherein a nissan tiida 1.8 cost only 1500 per month thru bank loan.