Spurs bought no players because they didn't want to add to the increasing debt for the stadium.
Everything else is smoke and mirrors.
Spurs would have been in the same financial situation had they sold some players and bought some players and ended up with a zero net spend - as they have generally done for the past 6-7 years. Selling players was the difficult thing this year because of the Premier League's early transfer window closure. No player sales, no players incoming. Same as it ever was for Spurs.