Purchasing A Game Field

[HeyLookABurrito]

Each year I see Teams with what look like Full built First fields like Team 118 from last year: http://www.youtube.com/watch?v=DojyJ9bZ4fk

The Loading stations and pyramids look like they have been made in house but the field itself and surrounding gates/driver station areas look like the first fields. My question is how did they get one? or did they just custom build it themselves from the drawings given each year by first?

Thanks