they are not crazy expensive but they are dedication to the vehicle...cutting the cab/bed is not all that fun. it takes time and patience. your looking more than just building an enclosure. could not say what it would cost one to do it as prices of materials will change for each person. mine was about $250-$450 in parts to get it in. parts needed: silicone, wood,nails, wood glue, screws, tonneau cover/rear cab, accordion boot, misc things i am forgetting as well...its a dedication project with your truck. the shop i ran/worked at charged a minimum of $2k per blowthru and people paid without thinking every time. i have done over 50 of them....