The “original” Navarre set consists of 12 separate, soft cover, books coving the NT. All are still available at about $17each.
The each have the English, the Latin, and the commentary, and some of the volumes have great articles and historical commentaries.
Then Navarre published a one-book, hard cover, of the whole NT - english and commentary.
Then the NT in hard cover in 3 volumes:  Gospels and Acts,  Letters of Paul, Revelation, Hebrews, Catholic Letters… in English and commentaries
The 7-vol set of the OT is now complete also: English, Commentaries, and Vulgate,
The hardcovers are surely nice to have… and it was not so bad buying them (about $40 each) when one came out every year or so. But the set now, at about $400, is expensive…, so perhaps buying one at a time is still best.
Good quality adds to the value of wonderful commentary.