So what's the question, really? Can you put him in his cot at nap time each day, nd let him nap if he wants to and have quiet time if not? It gives you a break that way even if he doesn't sleep, and the quiet time is somewhat restorative than more stimulating activity.
My DD dropped her nap at 26 months without ever having been lower than usual sleep needs - so just to point out that may be a possibility.