Are you going to come up with that every single time another club buys a bargain basement player ? Because Spurs are buying in Aldi until their stadium is paid for (and even well after that unless they can dramatically increase their commercial earnings - though the increase in salaries they are going to be pressured into could easily eat that up too).
Spurs are a bit like Leicester or Southampton at the moment as far as buying power is concerned. They are going to have to gamble on 50/50s. We don't want to be in that market, we want/need to be buying 80/20s.