£800 / month take-home is equivalent to a salary of £10k / year. I certainly wouldn't (and couldn't) afford to earn that.
Are you registered for paying tax on your spares business (I'm not going to berate you either way), but if not then you need to start to consider this if it is going to be a long-term source of income and what impact that might have on your earnings.
Are you registered for paying tax on your spares business (I'm not going to berate you either way), but if not then you need to start to consider this if it is going to be a long-term source of income and what impact that might have on your earnings.