Earlier quoted context omitted.
For the sake of simplicity, let's assume the ticket is exactly $2500. It was earlier given that he has enough to buy it. But if he buys the $40 smartphone first, then he only has $2460, which is less than $2500. Now he no longer has enough to buy the ticket. He can afford the ticket, or the smartphone, but not both. If not debt, where do you imagine the shortfall is going to be made up in order to buy both? Theft? Do…
And do you think he would not buy the season ticket if it were $40 more? When it goes up by $40 next year?
That is the implication in the link: That he will not be able to buy season tickets this year due to them costing $40 more than he anticipated.
But if you are trying to suggest that he has bought the tickets already, then what on earth are we talking about?