Is it worth it to Airbnb basement suite, capital gains?

[Dave Fairb]

Trying to figure out if it's worth it to Airbnb my basement suite. I'm in Vancouver BC, the house prices here have gone up a lot, and there's always room for prices to go up more. 

I've been digging around and it looks a bit like this;   

Scenario 1. Say my bnb takes up 40% of my house. I do the bnb business for say 5 years. In that time, say things go nuts again here and I'm ready to sell. My house has appreciated 500 thousand in those 5 years I did Abnb (not out of the question in Vancouver)   Then 40% of that 500k = 200k is the capital gain. Capital gain is taxed at a 50% ration in Canada, so 100k is then added to my taxes for that year. Taxed at 30% = 30k in taxes. 

Scenario 2. I rent out my basement suite to a tenant, landlord tenant act of BC applies. I pay taxes on the rents, less my expenses. Sell in 5 years and no capital gains tax as far as I can tell from my research to far. 

Scenario 3. My uncle lives down there and we have an agreement. No tax or capital gains. 

I'm thinking that Airbnb would have to earn me quite a lot more than just renting to a family, otherwise from a $ point of view, why pay capital gains. And a lot more than scenario 3.

Anyone got any thoughts on this one?