Prusa XL 5 Head with that money would be an excellent choice

Stratasys is suing there due to Bambu Lab having an office in Austin, TX

Wow, just buy or build a comparable PC at that price point

There is no such thing as food safe plastic

Make sure you update the firmware after setup I’ve seen alot of this solved by that Though there are some with bad boards

Also, have your Dad try out the new Mini firmware It’s supposed to give a nice speed increase