When was still a student on a budget I used Yardley’s Oatmeal Concealer. It dries out the extra sebum in your skin and also treats blemishes. For a foundation affordable in the long run, go for Revlon Colour Stay. It averages between R140-R180 and will last you for a few months while giving great coverage. You have to use much and it’s not unnatural looking on your skin.