These trailers are available for use at State, District and Regional Fire Schools as well as for Department training events.  In the case of District/Regional type training events where a large number of Departments are likely attendees, the SDFA has a program to help offset the costs of use by providing up to $2,500 in financial assistance to help cover the cost of trailer transportation, instructor fees (mileage, lodging, per-diem) and consumables (event must be pre-approved and documentation of costs must be provided).  

https://www.sdfirefighters.org/sdfa-mlftu-information/