Too basic (at least when talking about new machines, not vintage machines) usually means tension problems, which make sewing frustrating and unenjoyable. Since your grandson is at college, something portable that can be put away when not in use is a good idea. Janome Gems are nice machines, but a little pricey. Here is the machine I would recommend because it has been on the market for years and generally gets good reviews on Amazon and from quilters here on the QB:
https://www.amazon.com/gp/product/B000JQM1DE/
Walmart has it for about the same price, and Walmart has a generous return policy if your son doesn't like it. I would stay away from Singer. Brother and Janome are better brands.
Edit: Oh, yes, I forgot about the Eversewn machines. They are newer, but get good reviews from people who have tried them. There are 3 versions. The only thing is, they (and the Janome Gems) are more expensive than the Brother I linked above.