Hi Misscleggy - you could try speaking to your bank. explain that you may need a 100% mortgage, and ask if they have a mortgage that covers solicitors fees - then your outgoings are minimal.
Have you spoken with your landlord/landlady about how much they want for the property? If so, tell your bank what you would need to borrow, and see if they have a rate which would mean you pay back the same or less than your rent costs.
Good luck - it is hard to get on the ladder at the moment - I hope you do it.x