Built in or separate grinder [$700 CAD]

I recently purchased the Breville Bambino Plus ($500 CAD) for my husband for his upcoming birthday/ Christmas. This will be his first machine and I dont drink coffee- don't hate me- so I need all the advice! I'd like him to have an electric grinder but didn't realize they were so pricey. I'm starting to wonder if I should pay a bit more and get the Breville Barista Expresswith built in grinder ($730 CAD). Would you upgrade the machine or purchase a separate grinder?