I did care for another little girl for several years. My friends pointed out several times that I didn't treat the kids the same. It's really hard to treat another child like your own. They have different rules and expectations and their house, so you're always trying to get them to follow different rules, etc. However, the little girl did become quite close with our family and my child. Unfortunately her father decided to put her in daycare one day and never talk to us again, it was really hard on my son. (He was a single father that had a crush on me. He got discruntled when I married someone else and didn't want to talk to me anymore).
Anyway, overall I think home daycares are better than big box centers, but it is true that your child will not be treated the same.
Abra, Married to George, Mother to DS 12/03 & DD1 08/09 & DD2 12/11 + Someone New in May 2015! After years of planning, we are finally living our dream in South America!!