According to HSBC, I can borrow roughly £75k (based on projected earnings of £20k per annum, would have to get Autoglass to confirm that my bonus earnings would be stable at about £4k a year of course) which using their fixed rate for 3yr (4.99%) then 5.50% over 20yrs is £312 a month...

Is that good? Or not? I can see me paying that ammount, or more, on rent (+ bills on both circumstances of course - do you pay council tax when you rent?) but at least I'd end up with something to show for my money if I went with a mortgage right?