Sorry to answer your questions, yes the changeovers are an effort you can do them yourselves to save money however this can get a bit overwhelming so I would reccomend hiring a local cleaner who knows how Airbnb works and ask for references or proof that they know what they are doing. You probably need to find someone that is experienced so any questions or concerns you have along the way you can ask.
I understand about your bed however see it like when you go to a hotel how many people sleep in your bed as long as there is a mattress protector and clean sheets, duvet covers and pillows I do not see a problem if your a bit OCD like me, I have seperate ones like some landlords just for the guests. That way you can keep it seperate. I can give you a few insights for photo suggestions, pricing, turnovers, dates, areas etc. Just let me know happy to help.