Complex sentence: Suetonius also wrote that it was said that Caligula planned to make Incitatus a consul, and that the horse would "invite" dignitaries to dine with him in a house outfitted with servants there to entertain such events.
Split into simpler sentences: Suetonius also wrote that it was said that Caligula planned to make Incitatus a consul. The horse would "invite" dignitaries to dine with him in a house outfitted with servants there to entertain such events.