The best type of business to own is "one that over an extended period can employ large amounts of incremental capital at very high rates of return." (Buffett)
In practice, most high-return businesses need relatively little capital. (Buffett)
While the highest return attainable as a criterion is understandable, how capital intensive is a business is a very important consideration.
Buffett opines that between two "wonderful" busineesss one should choose the least capital intensive. He admits that it took Charlie Munger and him 25 years to figure this out. (Buffett).