The biggest cost would be licensing The character from the Star Trek people. You could probably run the ad for a couple hundred bucks on a single bus depending on the area
The provincial government tried to pawn off protected lands for commercial development ... it would be hilarious to get sued for advertising a Klingon Real Estate Agent while provincial leaders get away with blatant land development corruption
There is honour in a Klingon Real Estate Agent ... there is no honour in the Ford government