Regardless of how you drive, your tyres should wear evenly. I have taken so many sets from new to minimum tread on my Leon FR and all have worn dead level across the tyre. Uneven wear suggests an alignment
problem.
Regarding economy, my long experience is that better quality brand tyres grip better and last longer. It may be more to pay up front, but it does save in the long run. The other point with cheap tyres is wet weather grip - saving a tenner a tyre doesn't seem to be worth much to me if it adds metres to your wet braking distance.
Finally, within the quality brands, you can still choose between life and grip. I have normally stuck to Bridgestone Potenzas on my FR and routinely get 10k miles from the fronts with good grip nearly to the end. The Seat dealer fitted Turanzas on the front once, without telling me they were a different tyre to what I had fitted (thought they were a good price, seemed not afterwards!). The difference in grip was small in dry weather, but wet braking was very poor compared to the softer tyre. The payoff was nearly 20k miles from a set of fronts - nearly double the sticky rubber!
For economy in daily use, I would look at the tyre
reviews (what car, auto express, evo ....) and go for the one that gives the best wear combined with wet braking performance. You probably won't notice a bit of a loss of cornering grip in the dry and can adapt to the available grip anyway, but emergency braking in the wet has to be a top priority.