Spurs chose not to buy any senior players during the January transfer window despite concerns surrounding the club’s reliance on Harry Kane up front.
Andros Townsend was sold to Newcastle for £12m but the money was not reinvested as Pochettino places faith in youth and squad harmony ahead of big-money signings.
Tottenham’s net spend stands at around minus £6m during Pochettino’s four transfer windows in charge, with expensive arrivals like Heung Son-min and Toby Alderweireld offset by the sale of fringe players like Roberto Soldado, Paulinho, and Etienne Capoue.
Pochettino said on Thursday Spurs fans should expect a “tough period” as the club saves money for the new stadium opening in 2018-19, but the Argentine believes success can still be achieved on a budget.
“We grow up in this financial world and my quote is always, ‘Football is not an ordinary business’.
“That is very important,” Pochettino said.
“You can spend a lot of money and create a big team and win everything.
“But sometimes you can maybe not spend too much money and buy cleverly and by mixing the pieces you can build a big team too.
Spurs host Watford today, sitting third in the table on the back of five consecutive victories in all competitions.
Watford will present a tough challenge this weekend, as proven by the reverse fixture in December when only a late Son goal snatched a 2-1 win at Vicarage Road.
Quique Sanchez Flores’ side have picked up in recent weeks, with two FA Cup wins before holding Chelsea to a draw on Wednesday.
“They played very well against a good team like Chelsea,” Pochettino said.
“Quique Sanchez Flores is a great manager and it will be good to meet him on Saturday.
“We need to be focused because they are a very tough team and we expect a very difficult game.”
Sanchez Flores has stoked the fire by declaring he would not swap Odion Ighalo or Troy Deeney for Harry Kane.
Asked if he would prefer to have Kane in his side rather than Ighalo or Deeney, Flores replied: “No, no. I don’t change my players for anyone.”