Is that figure e.g. £750 min all in? Surely, council tax, utilities, etc would be additional wouldn't it? Also, what about food, transport to Walford, spending money etc? I know this is the plot and having a very realistic breakdown isn't in keeping with a storyline like this which is essentially a combo of a young newly married couple, depression, breaking away from a strong family unit and getting by in London but really, the producers are trying to knock a square peg into a hole and need to simplify the story.
Just seems to be adding more layers the longer this is dragged out and as mentioned previously, Mick and Linda appear to have a complete misunderstanding of their son who has dropped out of the army going into a new job in which he has no qualifications or relevant experience. Surely, his lack of confidence and difficult personal circumstances should raise alarm bells?