Better idea .errrr.... ummmm.. I mean a different idea.... would be to drop the number of members to 4. At least for the time being with the lower number of players. I went to hire someone today and there were only 2 members on the list. If it only had 4 per car, there may have been 8 - 12 options.
Then have a 5 man car record, and a new 4 man car record.