just a quick look, here is one in Morpeth at only £50 a week!
Sam Allan Estates}
another one in cramlington - commerical property you may be able to convert the use for £260/month
http://www.zoopla.co.uk/to-rent/details/17271707?search_identifier=85c6f0bded27f4f34df7346a5aed61a8
and this is a shop for the same price as she is going to charge you.
http://www.zoopla.co.uk/to-rent/details/17734506?search_identifier=85c6f0bded27f4f34df7346a5aed61a8
I know some of them would need more work than you want to put in, but I just wanted to show you so you have something to make a comparison to. best of luck
Thanks for the link Hun! Has defiantly put the price into perspective!! xxx