A quick search shows that as of July 2018 the ratepayers association for Kingswood has specifically identified 2 parcels in the subdivision for potential development with biking in mind. 387 St George Blvd and 70 Viscount Run. A pump track is suggested for Viscount Run.
https://drive.google.com/drive/folders/0B4xg90nXCPHuRnNBWWlqd3ZERms
There should be a funding program somewhere that could help provide money. That’s where your Councillor, Matt Whitman would hopefully help but there’s no guarantee, actually Id talk to Deputy Mayor Tony Mancini, he is very supportive of mountain bike development and very resourceful. It’s always helpful to have a group of people behind your idea. Talk to the ratepayers association… Are there other people in the neighborhood who want jumps or a pump track? Get them together, start a group, go door to door with a petition, get some enthusiastic parents of young children involved. When you have a group maybe contact Bicycle Nova Scotia or Mountain Bike Halifax for support again there’s no guarantee they will particularly do anything except point you in the right direction. If you want it, you need to carry the momentum or find someone who will. Be patient it will take a long time…
Or like some you could just walk into the woods and spend years dedicating hundreds of hours of your free time, spending your own money for tools and supplies to build something you want to ride. Knowing full well that it could get shut down or buldozed at any point but it could last for years of fun too. 
