The best-selling wine in Canada is Apothic Red. The NSLC sells a 3-litre box of Apothic for $68.99. That's $23 per litre.
An equivalent blend with similar packaging at Water'n'Wine would cost you $229.69 for 23 litres. Or $9.99 per litre.
And remember, you don't have to do the winemaking.
Equivalent wine is Winexpert Reserve Enigma packaged into Wine on Tap 7.5-litre system. All-inclusive price. Based on June 2023 numbers.