The April 2015 issue of MotorSport magazine has an interview with Kevin Wheatcroft. Although he loves the racing cars his real passion is WW2 military vehicles and they are providing the new exhibits in the museum. The interviewer notes that while they were there (in January) only 4 people were looking around so my experience obviously was not unusual.
Mr Wheatcroft is propping the place up financially and is optimistic for it's future but you have to wonder.

When I went I thought it very good but then learnt later on that it used to be better. But that's ok. When I saw the final version Vanwall and the P25 BRM I was overjoyed. I've always had a thing for post-war front engined single seaters and, for me, seeing them was worth the visit on it's own.

David Hunter