There are lots of great alternatives to buying a Christmas tree, and Barbara Erkelens of Koninstuin https://koningstuin.com/producten/products has some great suggestions for dwarf conifers and other evergreens that will happily survive indoors for a couple of weeks, and then go back outside to green up your balcony or terrace the rest of the year.

These are Barbara's Top 3 from their Christmas Collection
Picea "Skeeter's Broom"
Ilex "Dark Green"
Abies "Ice Breaker"