I have an online store in the US and I’d like to open one in Spain.  Which would be the easiest way to do this?  My wife is Spanish so I could get Spanish residency if that would be helpful.  It looks like the easiest business entity would be the Empresario Individual.  Do I need to actually form a Spanish business entity or can I do business in Spain as a US company?

I’m also wondering what is involved with hiring an employee in Spain.  I’ve read that there is a minimum monthly wage of 640 Euros after taxes.  Is there an hourly minimum wage?