This might have been true back in March of 2019.
But then JT was purchased. And the next horse? It was not being purchased through MB? It was in quarantine at the time of the shooting.
As for Rob, I will have to take your word that he is a master carpenter. Rob himself testified that he “slowed down” in his work whenever he believed “he was getting ahead” of whatever he believed he owed MB. Mike McGrain testified to doing much of the tiling job. Rob also admitted on the stand to slipping and doing drugs during the summer of 2019. Also, Simring testified that in late July, MB had a PI investigate Rob and Lauren’s background, and he then learned about their lengthy arrest records, and the long history of drug issues.
So let’s be honest, by early August, MB no longer liked Rob. And MB no longer wanted LK to stay.