The very best, most expensive, highest performance vehicles around the world are all delivered from the factory with synthetic. The "conventional oil break-in" is nothing but a myth. As a point of fact, GM recommends nothing but synthetic oil for their high horsepowered Corvettes & Camaro ZL1's, along with their luxury Caddies, Yukons, etc.. Ford and Chrysler all use synthetic in their better vehicles, not to mention that it's exclusively used by Ferrari, Lamborghini, Bentley and Rolls Royce in their cars.
So, if you want to go the conventional oil route, just buy a cheap car and it will probably come with cheap oil, which by the way is sufficient for what they're turning out.
It's as simple as that.