I generally would do the same thing. I'm amazed at all the hostility towards this. And most importantly, it doesn't read to me like you're being taken for a ride. Much better to help if you want, dictate your terms, generate good will and maintain the relationship etc than get a few hundred dollars, unless you're actually trying to make a living that way. Even from a purely selfish perspective, long term you're approach will serve you much better than trying to be transactional about ever interaction you have. And obviously you could always just say no if you didn't want to do it.