Where can I hire a large marquee in Spain! A website would be useful!?

Answer 1

I don't know where abouts in Spain you are, but you could try putting an ad in the wanted section of this newspaper.
http://www.surinenglish.com or try the Spanish web sites http://www.compreventa.com or http://www.segundamano.es
or ask the local Spanish as there are many hire shops, usually for gardening equipment but they might have what you are looking for

Answer 2

I don't know where you are in Spain but you could try looking on the following sites:
www.viva-almeria.com
or www,thinkspain.com