Cheap education in the UK

1) Online education
Such as open university or www.open.ac.uk/Scotland
You can choose your flexible time for studying

2) Choose your Institution Agent
FBT/LSBF is cheap to consider for a degree or professional qualification.
The classroom is small, not much books in library, cheap computer equipment for students but it reasonable for a price of £5000-6000 for a degree compare to others.

They suggest you to find books to read somewhere else.

3) Study on your own
You don't need to study to obtain CIMA or ACCA qualification.
You can download the exam paper, buy the book at http://emilewoolfpublishing.com/
Then you can get your qualification.

4) Apprenticeship
You can learn while earning by apply for apprenticeship
http://www.apprenticeships.org.uk/

5) Edx
You can choose the course of Harvard or MIT university in the US for free.
Edx.com 
It's easy to watch and learn online as well as taking test, do assignment. It's all free.
You can do it for fun or for real.

Good luck with your study.