I doubt Paul could afford to do Porsches either, sadly.
Yes, he did indeed work at Ikea. He said it was as much about keeping his feet on the ground as bringing in a wage, although I'm sure he'd not have done it gratis!
There are very few drivers in the BTCC who are taking a wage from their team. One or two may be getting a couple of quid from deals with their sponsors but I'd be surprised if any more than 4 or perhaps 5 drivers take a wage. Most will have other jobs or ventures to fund their living costs.