Yes its around €235 but I've heard people paying slightly more. You have to pay it, even if you turn over zilch, but of course it gives you health cover.

Your tax will be on top of that, and frankly you need to employ a gestor to do it for you as they know the dodges!

Unless you speak the lingo you will therefore need to concentrate on the ex pat market .... and you need to be aware that there is stiff competition and that plumbing is done slightly differently over here, although I'm sure the basic theory is the same