Just keep in mind, the bigger you go scale wise, the bigger the operating and repair costs are. Especially for electric large scale rigs, big lipos are NOT cheap at all, and neither is the proper charging setup for them. If you go gas, then you will need somewhere to store your fuel, oil etc, that is not inside the house.
If you've never seen one of the Primal trucks in person, they are huge, and they also weigh close to 200lbs. So unless you have help moving the thing to get to a play area, I'd skip it. They're cool to look at, but don't seem super durable from the videos I've watched of them. If you're gonna bash, I'd go Xmaxx all the way.