LOL no - not cheap. I'm originally from Melbourne, and my most ready-made accessible market for these books is Melbourne/Australian schools, for their language programs. I have been working in languages education for about 30 years, as a consultant for the last 10 years, so have good contacts. I finished my PhD (Applied Linguistics) in July this year, so these books are my post-PhD project. For the Australian market, I figured an American accent narration wouldn't sell well, so yes; I'm doing an Australian English version. But I know for some in the UK, they'll want that accent, and even here in NZ (where I now live), some would prefer NZ to Aus, I think. Plus I'd really like to offer them in te reo Māori.
My consulting work has diminished this year, so I've had time over the last few months to work pretty hard on these books. I now need to go get a day job though, so it's going to mean late nights from here on. It's been a big investment - about $2.5K so far, in illustrations/animations, translations, narrations, and advertising, but as of December I'm starting to sell subscriptions and a smattering of individual books. Still a long way to go to get out of the red! I'm hoping to build in 2021 (the day job is not intended to be a permanent gig - just keep funds flowing while I build the eBook business), but that remains to be seen. Even though I love the writing and loathe the marketing, I've got a couple of people working on texts now so I can focus on business development (and the day job).
I moved aboard a 40ft catamaran 4 years ago with my amazingly supportive, retired partner who keeps me plied with tea, coffee, wine and generally takes care of everything while I try and find ways to earn money from the back of the boat, so I can enjoy the lifestyle with him in the years while it's still possible. So I've had no commuting, even pre-COVID. It's amazing how much more productive working from home is (even/especially when home is a boat). The last 4 years have been great - circumstances are a changing a little now, but hopefully the eBooks will be a part of many more great years to come.