So, break it down for us if you DIY....
Have you been able to get a pulse on the cost of the mats if you buy them yourself? Seed?
The big variable is who/how to correctly prepare the soil...and how much will it cost. I would be VERY interested in the method planned to correctly and adequately grind down the soil on the slopes to create an ideal seed bed. What equipment would the $12K guy use to till the soil on those slopes?