For the right price I'm happy to make certain concessions. I guess that is what you've found in changing your prices - the more people pay, the more they expect.
Often when we are staying somewhere we are out from 8am-11pm. My husband doesn't like an idle, relaxing break! :) We just want somewhere to sleep. So it doesn't bother us if the room is not much more than space for beds, we aren't spending time in there. And if someone was happy for us to split a sofa bed and a regular bed between the 5 of us, we would do that (and have in the past). For a good price. And, of course, it is important to have a good description so people know what to expect.
And don't feel too bad about reviews where people are unhappy. We recently stayed in an AirBNB in Paris. One or two of the reviewers said they weren't happy about the cigarette smoke smell in the apartment, but most people didn't mention it. I read this before booking, so knew this was a possibility but was happy to take the risk as the apartment was so perfect in other ways. When we arrived we found that the smell was so bad I actually had trouble sleeping at night. But because I'd had a heads up about this possibility before booking I just dealt with it and didn't leave a bad review about it. I knew the condition and made the choice with that knowledge.
Definitely work with your children on expectations and build up their stamina. When our kids were little my husband and I were involved in many community organisations and would take our kids along to all of the meetings, even in the evening. From the time they were newborns, until now when we will have a teenager by the end of this week. It is possible, even with little kids, but they do need to be taught what is required. Because it was something we did regularly, they knew what was expected. People were always amazed at their behaviour and would comment on how 'good' they were. That surprised me, as I expected nothing less of our children than the right behaviour for the situation.
If there is something especially important going on, I give me kids a heads up on what I expect. There are particular words I use for 'special occasions', when only the best behaviour will do. Eg. when we take them to funerals I make sure I tell them just beforehand that I don't just expect good behaviour or best behaviour. I expect perfect behaviour for however long the event takes. And I strongly stress the word 'perfect'. They know what I mean, because this isn't the first time we've done this and because I don't expect this especially perfect behaviour at all times. Just for those special occasions.
My husband now works from home PT and I homeschool our kids. There are many occasions when he requires silence for an hour or two at a time because he is on a teleconference. Because this is a new situation they do need reminders at times, but I think that their stamina is reasonable because of all the work we've put in over the last (almost) 13 years. I guess my point is, it is worth the effort! And these skills can transfer to all sorts of life situations. :)