Well, this is what you will be spending:

1. House Rent monthly
villa (10,000 - 14,000) depending on what you chose
Apartment (5000 - 8000) depending on what you chose
2. Monthly expenses on food, electricity, water, phone
from 5000 - 8000
3. Transportation
(if you buy a car, , monthly payment of 1000 - 1500)
4. Medical
you need to take insurance if not covered by your
company

So, at high end, your monthly expense could be 25,000 and on lower end 20,000

So, you save from 10,000 - 15,000 monthly i.e close to 3000$ - 5000$

Regards