Beetlejuice:
And use an interest free credit card for the first few months for fuel .
In theory that’s a sound idea except that firstly I spent £9,000 on fuel in my first two months trading, and not many folk will have that type of credit limit, and secondly Keyfuels (or whoever) will generally give a considerably better price on fuel than roadside filling stations.
Best advice I’d give re buying fuel is to try to get at least two fuelcard providers as soon as possible, then you can play one against the other.