They've been scaling these things up over the past decade. The JetCat P1000 can exceed 200lbs of thrust.

What they really for this kind of build are RC turbofans, which are extremely uncommon. This thing puts out over 300lbs of thrust at full throttle:

https://www.frankturbine.com/en/FT1500.html

There are certainly turbines available that could power the model. He chooses not to.