I have been mulling over the original post. There is a specific requirement which is 2 homes side by side each with 5 king/queen beds. I only recall seeing one home advertising 5 king/queen beds (not counting sleeper sofas). (Sorry OP, I can't remember which home that was). More common is 4 queen/king beds.
It may be that deciding what is most important to your family group is the way to go.
Some thoughts that I had were...
Sleeper sofa. I don't recommend using sleeper sofas unless you really have to -they are not the best option for privacy and certainly not as comfortable as a mattress, but they are an option. Some homes do have queen sleeper sofas available in addition to 4 queen/king beds. Personally I would rather sleep on a twin than a sleeper sofa, but everyone is different.
If more king/queen beds is important, perhaps it is worth looking at 3 homes rather than 2. Obviously that will cost more, but it is an option.
Find 2 side by side homes which are as close to your needs as you can get and then make the most of the bedding arrangements that are available. (If you do move twin beds together at a home, remember to put them back as they were originally set up). There is something that you can buy that allows you to put to twin beds together and have them act like a king. You could purchase a couple of these to take with you (it would be cheaper than renting an additional home).
Some homes have twin over full bunks - perhaps a full bed would suffice instead of a queen/king.
Hope that helps,
-Kay
