Even with Ford’s Machiavellian cunning, I don’t see how he could have manipulated events to produce that
Remember, Ford controls EVERYTHING.
See for example Maeve’s belief she is autonomous, only to be shown by Bernard that she has been (re)programmed to do exactly what she’s doing.
So in the case of Teddy & Delores, Teddy gets off the train in the first town and immediately stops, “thinks” and says “Delores” before getting back on the train. These are programmed thoughts, he has to rescue Delores, who says “take me to where the mountains meet the sea”. No coincidences, Ford is in control.
Likewise the very end – he knows what Delores will do so yes, it is likely he made a host of himself to be killed. In earlier episodes, there is a new host being made on the machine in the field lab – possibly himself.