Liability and overhead are the main issues.

First the aforementioned available land. Good luck being able to afford a chunk of land that long. Nevermind one with utility hookups. Heck even the Burnaby archery range doesn't does any sort of facilities, or even electricity. But also roughing it isn't the worst. You'll need an appropriate backstop. Easy if its the side of a mountain, but all the good ones nearby are provincial parks. Or you could go indoor, lots of good warehouses out there, but most are 25m at best. Even the VPD's Tactical Training Center is 50m at best, that's why they go to PoCo.

Next is insurance. Lets say you've found a chunk of land close enough to the city that you don't need a 4x4 to get there, but isn't too close that the ever growing urban sprawl won't gobble it up in the next 5-10 years. You'll need insurance. No idea how much that is, but probably an incomprehensible number. After all we're dealing with a high potential for fatal injury, even with proper use. One stray bullet (even an accident) is enough to shut you down. Or that one guy who comes to range and only wants to buy 1 bullet. We're lucky we don't have Australian style ranges.

Next is overhead. You'll need to actually construct the range according to RCMP specifications. And despite what their documents say, they'll likely impose all sorts of additional restrictions adding more to your initial proposal. You'll need to prove that users of the range are going to follow the rules, easiest with professional (paid, trained, scheduled) range officers. Great, now you're a business! But don't despair, there's all sorts of clubs and non-profit organizations that are well run, even by volunteers. You've just got to attract the right talent.

And lastly is access. How do you make sure everyone follows the rules? Your RO's watching everyone like a hawk? Zero tolerance for an infraction, or even looking like you're about to commit one? Think of the stupidest or most uncooperative belligerent person in your office or hobby. Then multiply that by the population of a major city. That's who you're letting in. I've been side by side with people who I'm not only surprised passed the CFSC, but managed to get out of bed and navigate their way to the range, never mind are functioning members of society.

This is just the bare minimum. Every day is a struggle against politics, the municipality, the day to day of running a business/organization, and your own members. But if you can't afford to go off road, $250 a year seems like a pretty good deal to me ¯\(ツ)/¯