That depends on your net worth, your definition of 'expensive', and which Lotus you're talking about.

The Elise is on the high side of 'normally priced', but as commuters they're great because they get decent gas mileage.

A well-appointed Exige is close to $80k I think, and cuts the mileage in half. It's a track car, really, so anybody driving it on the streets is probably 'doing it wrong', but I've driven more serious cars as daily drivers so I'm not one to judge.

I can't really comment on the Evora because it's 'new tech', and is supposed to be expensive as such. They're expensive compared to the Prius, but they aren't really comparable either.

Edit: s/Elan/Elise/g. Memories.