Maybe too many dogs?? Once you have a kennel and want to increase #'s, then it would be fine, but since I only have house dogs, I limited my number to the amount that I can take care of in the house and incorporate into my daily life. I crate the young dogs in my living room at night. The rest live in the house just like I do.
I have six but sometimes board my puppies too.
The above requires a good vacuum and being extra vigilant about manners ie. not begging at the dinner table, no up on furniture, manners when someone comes to the door etc.
We have 6 and any combination of boarders at certain times. It usually works well, sometimes someone's personality throws things off a bit but.....