We usually have 20 plus cars (Formula Fords) each race in the Phoenix area. The last race was held at Chuckwalla and only 14 showed up. Chuckwalla was only a 3 hour drive; 200 miles away from Phoenix. Everyone that normally raced but didn't that weekend mentioned the extra hotel cost, long drive, and needing to take off from work as the primary reasons for not going. This shows how missing a day from work, adding a few hours driving, and adding the cost of an extra night in a hotel do in fact affect entries.
If a relatively short tow and a single extra day off work combined with the cost of an extra night at a hotel shrunk our group by 33%, doesn't it make sense that the higher costs and extra days of the Majors does negatively affect the number of entries?
It is very obvious looking at it from an objective viewpoint.
This debate about the cost affecting entries is very similar to the debate that we had about racing a spec tire (the Toyo RA888) vs the open tire rules and how the cost affects entries.