Its common in units with children and sometimes even with heavy footed adults..To show a ground floor only unit to someone with kids is called steering,,  if you have several apartments open you can't limit the upper levels to people without kids.. it makes sense but.. not legal..your more than likely to have this issue with the next tenant also that moves in..You could mention to upper level tenant you have main floor coming open if she'd want to transfer but even if you rent to people with kids in that same unit in the future they might object to the upper peoples kids noise, which could be basically normal just not easy to deal with..how many bedrooms is it.. sometimes it's better to limit number of occupants to each apartment.. to keep number of occupants at a minimum.. if they are 2 bedroom units.. you could just say 2 people,, legally you'd be able to rent to 4 persons,, but you can set the number of people as long as you stay consistent.. so all your 2 br units would be maximum of 2 people.. limited noise, limited people and you think it would limit the market for you but honestly If I knew moving in the whole house could only have 2 people per unit I'd be in love.. 

I'm not sure how I should be thinking about renting a SFR out of state though.The neighborhood is one of the most popular neighborhoods for college students and young adults.

I purchased a couple of units for what i consider a good price in an adult community in boca raton florida.

It included three telephone surveys of 3,036 adults, 1,515 men and 1,521 women 18 years of age and older, living in the continental United States, and interviews were completed on August 9-12,16-19, and 23-26, 2012.Highlights Include:- More Than a Third of Investors Plan to Buy More- Investors spend $9.2 Billion a Year to Repair Housing- Lower Interest Rates and Access to Credit Top Investor Incentives- 28.1 Million Americans or 1 in 8, Consider Themselves to be Residential Real Estate Investors or Own Residential Investment Property TodayThe complete study report can also be viewed at:Joint BiggerPockets.com / Memphis Invest National Survey of Residential Real Estate Investors- September 2012The news release with highlights:Most Active Real Estate Investors Plan to Buy as Many or More Properties in Next 12 Months - 9/20/12Coverage from our BiggerPockets Blog:Joint BiggerPockets.com / Memphis Invest Survey Reveals Investor Trends, Market, & Impact

an adult and 2 kids.

I see the wonderful connections that are happening on BiggerPockets, but I can't help but second guess myself with all the adults in my life (non-real estate investors) that caution me against trusting anyone i don't know in real estate.

Assisted living facilities and continuing-care retirement communities are very different from what we usually refer to 55+ Adult Communities – these places are never (as far as I know would even be considered in our real investment portfolio) – just clearing that up.Now, 55+ Adult communities have some basic identifying characteristics: The unit prices are lower, they all operate under a strong HOA which controls entrance/purchase requirements, and if and when you will be allowed to rent/lease your unit.

You are renting to an adult.

I have owned a few hundred section 8 homes.. and you can take some serious ware and tear with those.. the adult children living at home ???

They are grown adults, right?