One of the worst things to be faced with financially is for one's loans to be recalled by the bank or lender ahead of when they would be due for repayment. This is something that would be devastating to any borrower of money.
I agree for most people, but for this family, the leader who controlled all the money did not have this attitude so I am not sure that JS would think any different than his father.
If you do not have the money and your father has always bailed you out regardless of the situation, why stress it, as it appears JS ignored the request, and IMO he speaks of it as if it was part of a family disagreement or quarrel and really nothing to do with anyone needing money. He would not murder his father over his need of 50 million - I do not recall any mention of why he would not kill his mother but regardless his wording is he would not do it (makes me think of HS comment on missing a meeting, something like -dealing with a family matter)
IMO B&HS were planning out retirement and senior life in a new home, a new chapter, they were older and wiser with the wealth they had and the power it held and they were making changes to how they financially supported their children. BS was pulling in some reins and creating new rules for many of his companies/trusts.
I think this frightened or frustrated someone or a couple of people who are close to B&HS, sadly people in the close family unit. If they did it on their own or hired someone I have no idea nor formalized an opinion. To me, the nightwalker could be one of these people and not a hired hitman. But most other observations of the crime include a hitman as the culprit. If it was a hitman, I think LE would know and hope they are running a Mr. Big operation with the players that may have hired the hitman, and one day we will hear of the arrest.
I do think it was planned, Two scenarios run threw my head, HS was the initial target, she was the hindrance and influence changing BS views, and B&H were getting along better now as per the children. But BS came home earlier than expected - she asked him too, this was not his normal arrival home time - if they had been watching the home this would be unexpected and now they had to get creative in staging. OR this person was expected that evening to speak with the two of them at the home, thus why she needed him home at a specific time.
I think it had nothing to do with any business at Apotex. That is a large employer and has full management to run it after the deaths, killing BS would not kill the company, not immediately anyway. The only way I see it as part of this crime is when they sell it and add money to the trusts or Sherfam companies.