Neighbourhood parking woes

I live in a neighbourhood of small detached homes, most of which have suites. The challenge we are facing is the lack of street parking. This is especiallly challenging because we have a large number of people who work in trades and have their personal vehicles and work vehicles (often large panel vans) that take up the same space as two smaller vehicles. One person in particular now has three separate vehicles and a large trailer. Are there any city bylaws that limit how many vehicles one home can have? Has anyone else come up with any solutions to similar problems in Victoria?