With 2000 a month you should be fine just to maintain and run the car, assuming that you use a tank of fuel per week and that the car is running with no problems. If you drive 400-500km a week, then your weekly cost for that will be around $50-$60.
Also keep in mind that you'll have to have some money for rego, insurance and inspections of the used car you are looking to buy.
As for maintenance, it really depends on what condition the car is in. That is why it's really important to find a good example.