Wow - those are tough regulations where you live.
The thing about testing the waters with Airbnb is that ABB bookings often come with very short notice. Can you risk renting it out a few times without the proper license to see if it’s really something you want to do? If it helps to know whether or not it’s worth it, the only thing I can say is I’ve never heard of a host say. ‘I started with Airbnb but just didn’t make enough money to make it worth it.’ That of course changes if you need to go through that expensive process to rent, but you could maximise your exposure by listing with a couple of different sites.
I have a granny flat where we lives that operates at 95% occupancy. I paid off the bed, furniture, fridge, sheets etc within 2 months. I also rent our holiday house. The wear and tear is significant as the house sleeps 10 people. So I have a 5 night minimum. I’m not always rented - in fact only a few times a year but the $$$ pays for all the maintenance (plus a little extra) of owning a holiday house.
Hope that helps and Good Luck.