Rules for wires in the crawl space in Toronto Ontario Canada

I have a 25Feet of crawl space (36 to 42 ht) under my living room. This part of the house is 40-50 years old. I want to bring the power to other side of the room about 35 feet (6M) from the existing panel to install 2 - 1 ton split Ac and a small kitchenette requiring max 30Amps

Can I run a AWG6 (6/3 cable) by either clamping it under the joist?

Or alongside the inside load bearing wall where joist are supported

or using the old disconnected water heating system pipes as conduit

This will save me a ton of work then drilling holes in the joist and maybe partially weaken them

Thanks