Personally I wouldn't bother.... the amount of people I know that I used to go to school with that are in debt because they went to uni is unbelievable .... wouldn't be so bad if they actually ended up in a decent profession, something along the lines of what they actually studied for ... most of them are doing jobs that they could have done without any qualifications.
I guess you need to decide if you really think further qualifications will really make your employment prospects any better?
If I were you I would start looking for another job, I know it's a family thing but £5 per hour is peanuts.