Whoa Stephen....Spain and work do not go together at the moment.
Bar work is very seasonal so you're really only looking July/ August time for that. There are obviously bars open during the rest of the year but all those without work after the summer are then looking for jobs again for a more permanent income. So there will always be a lot of competition for bar jobs.
I really can't be any more positive than that
It's really tough out here work wise at the moment so you need to have something lined up or a few fall-back plans as there just aren't any guarantees.
In terms of rentals, check out our long term rentals in Spain page.
Best of luck.
Justin