Yeah, been there done that. You'd think that when a relative requires
extensive tech support that they'd at least send you $20 at Christmas or on your birthday. Nope. Sometimes the best solution is just to send them a link to an article, tutorial, or manual and tell them you're too busy.
The worst are the people who really need some tech advice. Out of pity you offer unsolicited advice about how they should go about doing or upgrading something and that it can be relatively easy/inexpensive. You even point out the pitfalls and problems they should be careful of.
What do they do? Ignore all of your advice and then ask for help resolving the disaster they created.