DP formula is so old school, those teams should start to live in 2013 and have proper race car. To be honest LMP2 isn't that expensive and the same Peter Baron said one year ago that his DP programm was nearly as expensive as the WEC one !
An LMP2 cost 400,000€ and an ELMS season is about 200,000€ to 300,000€per driver (2 drivers). That's cheaper than a go-kart european championship season and much cheaper than Formula Renault 2.0 Eurocup.
At Imola only one LMP2 was faster on straight than GTE, I doubt it is suitable to slow down LMP2.