I want to visit Morocco for two weeks on $500 spending money (airfare paid for). Is this a Tangierble idea?

No these countries are not cheap now 500 US Dollars will give you 3,637 Morocco Dirhams , that's not enough for a holiday .Do you have to pay for accommodation and food from that money .Sorry if that's not what you wanted to hear none of these holiday destinations are as cheap as they were a few years back.