Let me be another.
From Forbes (https://www.forbes.com/teams/buffalo-sabres/#1e249ded64f3) :
This is demonstrably false, both in reporting an incorrect value for the teams operating revenue as well as misattributing that information to Forbes.
If I was to be generous and assume this is not a result of incompetence or malfeasance, then I might assume you don't know the difference between revenue and income. If you believed that these words were wholly synonymous, here is a link that explains the difference between the two: https://www.investopedia.com/ask/answers/122214/what-difference-between-revenue-and-income.asp .
In this sentence, the phrase "as well as" serves as a conjunction. A conjunction should only be preceded by a comma if that comma is separating two independent clauses. A reader of English would therefore be lead to believe that "The Pegulas have spent hundreds of millions of their own dollars on arena upgrades" was a separate stand-alone thought distinct from "building a hotel, restaurant and practice facility adjacent to the arena". With that in mind, the story does not note that "the Pegulas have spent hundreds of millions on arena upgrades and constructing a hockey/hotel/entertainment complex" (removed a comma for you). The story does in fact say that the "Pegulas have spent hundreds of millions of their own dollars on arena upgrades", and that is separate from their "building a hotel, restaurant and practice facility adjacent to the arena".
If that was not the meaning you intended to impart then perhaps gaining an elementary understanding of the language you are writing in may help you with any future attempts to make a cogent argument.