@Kai Hicks
When my husband and I purchased a home it was a soft market, so I rented out my Northern California condo to a really nice elderly lady. Her son, a corporate lawyer paid the rent. I thought it was sweet he would do that for his mom. After a short while we realized he was paying just to get her out of his house and I started to consider it a rent/babysittng fee.
She called constantly: There was water in the carport (it had rained), light switch stopped working (it was on a dimmer), ants in the kitchen (don't leave food out). She would call me, she would call my husband and she would call the PM company for the HOA (who ended up really hating me during her tenancy). She wasn't senile, she was just lonely because her family was ignoring her. That 2 yr lease that looked great at the beginning felt like it would never end.
When her lease ended, she went month to month (refusing to pay the full rent increase and only paying what she felt I should get). I got a note in the mail from a realtor with buyers wanting to purchase my unit. When I told the tenant she said "No, I won't let you sell." Thus began an extremely stressful 10 weeks (occurring simultaneously with losing my dad). She was having the time of her life because her family was finally paying attention to her - they were all afraid she was going to end up at their house.
Thanks to patient buyers, a hard working realtor, a wonderfully smart husband and me getting more hard nose with an elderly person than I would ever want to get, she got out in time for the sale to close.
My advise is to be aware that nice can turn ugly very quickly and to let all the little requests add up, taking care of 2-3 at once when it works for you.