Doing a community prom for the ids 5th thru 8th grade

Doing a community prom for the ids 5th thru 8th grade.  Had building 4H but it was cancel due to Coronavirus.  Now using another building for amount $500 dollars, need to get a discount because want profit made due to the funds being used toward the event so far their hasn't been enough funds  made to even cover the $500  deposity but I will pay out of pocked for this event. Hoping to have this event each year, so children will havev something to do  in the community and look forward to something special if there is profit to be made.  I even hope to make enough funds to give  each school a 500 dollar  scholarshp and put the Trent toward the next event for next year.  The building owner want to know why should you get  discount on the building