As for financing the debt:
"The Club has completed a £637m multi tranche, long term financing anchored by a Private Placement and new bank facilities:
• A first time issuer in the US Private Placement market, the Club raised £525m of finance and was significantly oversubscribed and supported by several highly established international institutional investors.
• The refinancing successfully extends the longest debt maturities to 30 years.
• The average maturity of the total debt package of £637m is 23 years and the weighted average coupon, including the new bank facilities, is 2.66%."
https://www.tottenhamhotspur.com/news/2019/september/club-refinances-construction-debt/
So, as you can see, the average debt interest is extremely low, and the average time we have for full debt repayment is long (23 years), if the club so chooses.
This means that the club will not be cash-strapped in the years to come - not with the level of income we now have.