I use a company called www.economycarhire.com for car hire from Faro. They act as an agent for local companies and offer an all inclusive price, provided you pay in advance. I've never used a people carrier, but I found the following on their website for £322 for one week in October :
I have always found www.holidayautos.co.uk to be best for care hire as they refund the full Super CDW to your credit card at the end of the hire period. A Ford Focus S Max is brilliant for 4 people, great boot & very easy to drive - will accomodate 4 sets of golf clubs & luggage.