Can anyone recommend any cheap car hire companies, where we can pick up from Faro, please?

There will be 9 of us - 6 adults, 2 children and 1 infant (who will be 17 months - and will require a baby/child seat).

Would it be better to hire a 9 seater (bearing in mind we have luggage also), or hire a smaller people carrier, and small car.

My thoughts are that it would depend on how often we would all go out in smaller groups, and/or how many taxis we would take in resort (Carvoeiro).

Any advice gratefully received!

Thanks.