Below are some tips for you, but you do the math please. For high class living you should be costing your employer 55000+/year for: salary, provided furnished villa living with maintenance, transportation (provided car with fuel +maintenance), health care for the entire family, schooling for kids, 1 trip back home for family.

Proposed Income: 35000 total all inclusive.
Minus expenditures,
Housing: 12000 to 15000/m for a 3 to 4 BR villa
Part time maid for house cleaning: 500/m
Soft furnishings: cutlery, pillows,kitchen counter tops: 5000/one shot deal.
Utilities, internet,phone, water, electricity: 1000+/m
Car,petrol,insurance 3% of value, maintenance: 2500 to 3000/m depends if sedan or 4x4.
Driver for wife in lieu of a 2nd car: 500/m
Groceries, credit card, outings: 4000 to 5000+/m depending on your lifestyle.
Trip back home: 20000 to 25000/airfare for (4), depending on kids' age, boils down to 2000/m.
Medecine insurance, dental, etc. for family: to be evaluated.
Health care, lab tests at hospital: covered for residents.
Schooling for kids: anywhere between 3000 to 6000/m depending on age and school.
Worse case scenario: you would be saving 5000 QAR/m or 1500 CAD/m approx.
You still have to spend money on your holiday in Canada or elswhere? : budget it according to your lifestyle.

Think before deciding. Good luck.