... or get a 0% credit card deal and renew it each year - choose your own repayments
I bought my first 749s on an Egg card that gave me 1% cash back on purchases and interest free payments for 18 months, then moved the balance to a new card with 18 months interest free credit.
alas funds wont allow even the £200 a mointh at the mo still, have tio make do with an engine refresh and rebuild my other and live with the (hopefully) 130ish bhp