Trumpet Archon Trompe would be 15 + (14*2) = DC 43 Spellcraft check; DC48 without Craft Construct feat.
Cost: 30,000g in crafting materials, and 2 weeks of dedicated crafting for a wizard and his valet familiar.
For psychology might have to add periodic spellcraft checks or maybe diplomacy checks.
Exploit? yes. Easy to do, at level 5? no.