It is not uncommon, particularly in university towns, to find occupancy limits on the number of un-related adults per dwelling unit.  

@Tim Debronsky Perhaps a silly question, but would you say there is any need for an LLC if you are an American citizen?

(Other houses for sale or rent in the area)I believe most adults take showers but families with kids will generally want a tub.

I am a graduate of the George Washington University Law School and a member of the Florida, New Jersey and American Bar Associations.JeraldB1

By American standards, if you can keep 80% of your customers happy, you are considered above standards.  

Exceptions happen and can be discussed among reasonable adults, but the relationship needs a foundation within the rules, not within the exceptions.

Empty nesters are often downsizing from large suburban single-family homes, and one recent survey found that 75 percent of retiring Boomers expressed a preference for mixed-use, mixed-age urban communities.Capital Markets: American urban real estate attracts a huge amount of foreign investment.

Though todays photovoltaic panel technology is significantly better than a decade or two ago, it's still not cost effective in most North American jurisdictions without subsidization - this is really not surprising, most of our traditional form of energy were heavily subsidized until they reached a sufficiently critical density of uptake (some still are subsidized today).My reference to solar above was for solar thermal systems to heat domestic hot water and/or provide space heating.  

@Annette Ammarell Don't you give those people one bit of leverage on your psyche.I have done EVERYTHING that society says you're supposed to do to achieve the "American Dream".  

Quite frankly I'm embarrassed for you the way I am for American idol tryouts that cannot sing.