Here is my two cents worth... a machine, Singer or brother, for under a $100 is a great deal for a beginner. Or pick up an older used one from a dealer or sew/vacuum center or repair shop.
You don't know until they get one, just how interested they really may be.
If they use it for 3-5 years, treat it well, keep the bobbin area clean, it will be a great machine for them. Most of the new machines don't even require oiling. Then maybe look to upgrade :wink:
There really is not a need to take these inexpensive new machines in to be serviced, at $50+ each time... It is more affordable to just replace them every 3 years. You can always find these lower end machines, new, for $100 or less. The same price or even cheaper than two service/maintenance bills :D:D:D