First question yes, second question no.
I think this was planned months before, whenever Joey started getting sick. I think CM was poisoning him to weaken him and I think his plan was to steal the business contracts as soon as he thought Dan was going to be paid off. Dan was the spanner in the works because he did not relinquish control.
I also have a feeling that this was maybe going to go down on the day he printed the first cheque, on the 2nd, but McGyver being there scuppered that plan.
So I think it was completely premeditated.
He was in and out too quickly with the four bodies for it to have not been planned with precision. He had a plan for containing the blood, where he would put them until he could bury them, for not having his phone on, he'd stolen the cheque stock.
I think the cheque at the house was also planned, maybe the printer mucked that up, how he would deal with the dogs, he probably had even purchased the big bag of dog food in advance, the window opened so he could come and go through the back without neighbors observing him, where to put the Trooper until he could take it to the border, the whole lot.
JMO
ETA Maybe even that's why he didn't care about slacking off work in the month before because he thought it was all coming back to him, he'd deal with Joey before Joey could deal with him.