[prostoalex]

I received a BA in my native country and then MS in CS in United States.

Cost-wise it's an optimal option, since US undergraduate tuition is generally a rip-off, while in grad school there are assistantships and research grants.

If design school is easy for you, spend your free time studying computer science and concepts. If you plan to apply to a US graduate school for an engineering/CS degree, you should also prepare for GRE and GRE CS - even if schools don't require them, impressive scores convince them that someone without documented background put in enough effort.