In our fellowship, five families are currently meeting together on a regular basis. That makes for 25-30 people. By American standards that is a lot of people under one roof. Many people equals more stress. It's just the reality of the situation.
Additionally, when people are coming over to your home, what do you do? You probably pick up the living room, make space in the kitchen for the food, shove various and sundry things in closets and under beds, vacuum, wipe the crust off the bathroom, etc. This takes time and effort.
Please hear me when I say that these are not bad things. Hosting a house church gathering is wonderful. I love it so far and look forward to doing this for the rest of my life.
Another thing to keep in mind for us men: when people are coming over, it probably means more stress for our wives than for us. They tend to do the cooking, they tend to get the kids ready, they tend to be more concerned with the looks and smells of the house. Thank God for the ladies! If not for them, we would be gathering in more of a locker room atmosphere.
There are certainly things we can all do to help this process. Families who aren't hosting should take the bulk of responsibility for the cooking. Our house fellowship hasn't yet made this decision, but we will likely discuss it. Visiting families can also provide other necessities such as cups, plates, etc.
One huge help in our house fellowship has been rotating homes. So far (since we've been involved) we have gathered in three different homes. This takes the stress off any one family and lets everyone share the load. No one is burdened by having to host every week. It would of course be easiest and maybe most convenient to always meet in the biggest house, but this is a lot to ask of the family who resides there.
My simple suggestion to all house fellowships is that you set up some sort of rotation so that no one family is over-burdened and so that everyone knows where the next meeting will be. You may be limited by the size of certain homes, but if you even have two places where you can gather this will be of great benefit to all involved.
Addendum: we are greatly blessed in this country to have the size homes we do. In many places around the world families live in homes that are barely big enough for the family itself. Believers somehow find a way to meet in homes, but I'm sure they are extremely crowded.