I've begun a BA in History at Athabasca, just because.
This is great.
I would consider how much the economic value of the degree is to you. Having been through university, i know that the majority of the dollar value of the degree is in the piece of paper you receive and what economic/career opportunities you can do with that. The large majority of the actual knowledge obtained at the university in arts/social sciences disciplines is obtained through the books/articles you read, with lectures summarizing and expanding on it. Anyone can obtain this knowledge for $10 in late fees at the library. Course outlines (with the readings) are often posted online at different universities. I've made a habit of picking up used textbooks here and there and learning on my own.
But if the 20-30k or whatnot for the degree is of value to you for whatever reasons you decide then that's great, wish you the best if you decide to sign up!