Feasability of 2-Family Household

Now that I can begin planning my future for the first time, I have started thinking about what I truly want in the future. A boyfriend with kids seems like an automatic. But since I do really like a sense of community and a larger family, I started wondering if two family households are possible/common? Basically me and my boyfriend plus a lesbian couple. I guess four kids would fit nicely into that equation.

Of course as you add more people to a household, there are more resources as well as more opportunities to reuse items and resources. I am roughly 3-10 years away from even thinking about actually starting a household of any kind, but this idea entered my mind and I would certainly like to get some thoughts on it. I guess it seems like you could build a nice house with two master bedrooms and an oversized kitchen, etc. Take the resources of four people into consideration during the construction and there are a lot of possibilities.

Possibilities for conflict are probably quadrupled. A couple already can develop conflicts and split. Now there would be two more people with more kids. It would probably be one of those longer term goals that would need to be carefully worked up to, in order to reduce the chance for conflicts. Of course if things got too bad then another couple could replace the one with issues.

It would offer both male and female figures, along with what could be an insanely stunning sense of community, basically having four parent figures.

How does this sound?