In November, Stoke invested a further £6million in their Clayton Wood training ground to improve the facilities for Academy teams, having spent just £5.5m on bringing Geoff Cameron and Michael Kightly to the club last summer.
Pulis said: "We have a plan, and it's gradual and gradual. It's not one we're going to throw loads and loads of money at and then get caught with our pants down.
"We've spent on and off the pitch and we're continuing at the moment. We've got a new build at the training ground and it's going to cost us a lot of money.
"The structure of the team is very organised. We work very, very hard on the training ground and we've got gradually better over the years we've been in the Premier League, but we are a football club that came into the Premier League after 23 years out, so we've had to spend a lot of money not just on the team, but on the structure.
"The training ground, putting the stadium back into place after no investment, car parks, the lot."