This is the article I was referring to before:
https://www.globalcapital.com/article/b1jwyxhxl2qt1q/everton-hires-jp-morgan-mufg-for-stadium
It talks of the 'US Private Placements Market' being a means of obtaining the money to build the stadium. The article reports that Tottenham successfully made use of this method in the construction of their new stadium.
The investors of these private placements reportedly get between 2% and 3% returns. That may be attractive to some rich people if the ROI is seen as guaranteed, but the coronavirus has clearly knocked some confidence in the longevity of the premier league's hitherto ever increasing success.
Having said that, nobody is expecting premier league football to come to an end.