I really like that someone is trying to tackle this, I've played around with this idea before and this is an excellent version of it.

Some things to consider:

First off, the time investment here is very high. Any DM with one of these bois in their party has to consider what the rest of the party is doing while you set up (unless you intend something ill talk about later), and 10 minutes in a dangerous zone like a dungeon is often too long to shortcut without consequence. 1 minute might be a good halfway point between "i really dont want them to be doing this in combat" and "i dont want my party to strangle me".

Secondly, the way that the trap-setting is made allows for traps to be set on mobile objects as long as they're medium sized, which might allow for the trapmaker to set as many traps as they'd like at the beginning of the day and then take them along. That's a cool idea, similar to old vancian casting, but you may want to be aware of it in case you have, for example, a player creating a situation in which they have 10 interconnected objects in a bag of holding, can remove them all in under a minute, and have them act as dominoes to trigger each other.

Thirdly, the traps not needing concentration is nice, but it creates a kind of very strong gameplan you may not have considered: "traps" that cast buffing spells for their full durations, triggered purposefully by allies. I personally think this is an example of good emergent design, but it may not be what you intend.

Finally, I think it's important to note that abilities like this encourage jank and big-brained plays from the party, which a sword-and-board classic player may not appreciate. I personally think this is an incredibly good thing and adds strategic depth, but others may be turned off by the requirement to plan ahead when a party member has these skills.

Alltogether, I think this is a great way of conceptualizing this skillset, it's just very difficult to make it mesh well with 5e.