Everton will have a £20 million-plus transfer fund for Roberto Martínez to upgrade the roster.

Martínez also wants to increase the number of hours players spend in training by building overnight accommodation at Finch Farm.

Martínez has sold £40 million-worth of players since his arrival from Wigan Athletic – Marouane Fellaini, Nikica Jelavic and Victor Anichebe – and also removed John Heitinga's lucrative salary from the wage bill. Almost half has been reinvested on James McCarthy, Arouna Koné and Aiden McGeady.

Signing Romelu Lukaku on a permanent basis from Chelsea is a high priority, as is a return for Jack Rodwell.

"We've got money to spend this summer," said Martínez. "Remember we sold £40 million worth of players and we only spent £13 million [initially]. That money is there to be spent. The new TV money won't make a massive difference on the playing side because we've got a lot of things we want to do on the training ground. We want to build accommodation here, have bedrooms on site, put a new pitch in and give the training ground a big lift. I'm going to use the money for that."

Asked why he wants players sleeping at Finch Farm, Martínez said: "Because you can work. Young players especially, any player under 24, needs to have the right balance of training and recovery. The moment you lose a player to injury and he has to go home to recover and come back, it makes it impossible to get two sessions in. You have to have that base to work if you want to invest in youngsters.

"The 10,000 hours rule [the supposed time required to become expert in any field] is impossible but if you can get a player doing double of what they do the benefits are incredible. Even before games you have to go to a hotel. You don't create that environment of feeling at home. It is now a must to have bedrooms. Every first-team player should have a bedroom."

Martínez also said that the transfer budget could be determined by whether they're in Europe in which depth is more critical.