What a mysterious thing it is: motivation or indeed the lack of it, is a factor which has an effect on everything that we do with our lives.
According to Funk and Wagnall (todays dictionary of choice) motive is a conscious or unconscious need, drive etc that incites a person to some action or behaviour.
This seems to imply that we require some sort of "payback" for every action that we make, which is a fair enough assumption, but what interests me more is the subtlety of motives, how come for example can I find the energy and enthusiasm to be totally immersed in the renovation of my daughter's house (which I won't be living in) but can barely be bothered to do the basics in my own home? (which I do live in)
I'm feeling a bit irritable today, is there a full moon due 
my moods seem to be ruled by some external factor, so it could be that!
I went shopping yesterday, and bought some new winter shoes, how's that for forward planning?
I haven't had a holiday this year and I'm feeling a bit badly done to (Yorkshire phrase, means sorry for myself)
I would like to apologise to anyone who has taken the trouble to read this post, because having glanced through it, my conclusion is that it's a bit of a random waffle; but hey ho, what the heck, it obviously filled some need, otherwise I wouldn't have been motivated to write it
SeasideMan
Pro 
I think there are all sorts of motivations. Some of them are for pleasure, some to get a good feeling from helping someone, and some just because if you don't act something bad will happen.
In your case, you must want to help your daughter more than yourself. That sounds normal and reasonable to me.
Tom.