You win large jobs from your invoices?
Repeat business mate. If you give off the right kind of image they will want to keep using you.
I've not lost any accounts because the accounts clerk who produces and sends the cheque complained to the boss that the window cleaner used a tatty personal account!
Remember, in big businesses, the person who contracts you will not be the person who sends you the cheque. In fact in many instances, I send invoices off to head office, or a central paying office, in other parts of the country - and not to the establishment or the person who contracted me to clean their windows in the first place.
Its your appearance, your bearing, and of course the standard of your work that keeps the contract; not a bank account name.