Newcastle boss Sam Allardyce has warned the club's fans he could not buy instant success with £100million.Allardyce became the sixth manager in less than 11 years at St James' Park when he took on the challenge of succeeding Glenn Roeder in May. He arrived knowing many of his most recent predecessors had departed in short order having failed to end a wait for silverware which now extends to 38 years, and 52 since a domestic trophy last arrived on Tyneside. However, while acutely aware of the price of failure at St James', and the demands which will come if Mike Ashley completes his £134.4million takeover, he insists he will need time to build his vision for the future. Allardyce said: 'Everyone wants instant success, but that is a recipe for disaster. 'In fact, the club has been a disaster in terms of success in the last 10 seasons, and if you want that, you aren't going to get that from me. 'There is too much to do to have instant success here, even if we spent £100m. 'We have to put in completely new ideas and a complete new structure behind the scenes and then you have to sell this to the players, which takes time.'' Allardyce has made a positive start to his reign, persuading striker Mark Viduka to leave Middlesbrough and head north and reaching agreement with midfielder Joey Barton, pending a cash wrangle, to join him. The Magpies have a bid on the table for Paris St Germain defender David Rozehnal - who is also being chased by Borussia Dortmund - and are pursuing Tal Ben Haim, Habib Beye and Sami Hyypia, while reports linking the club with Reading's Nicky Shorey certainly fit the stature of left-back in the manager's sights. However, despite talk of major investment in the playing staff should Ashley push home his interest after acquiring a near-70 per cent stake in the club, Allardyce insists he needs time to establish his vision, and knows there is only one way to assure that. He said: 'My job relies on winning football matches at first-team level, so I will adjust everything accordingly to make sure every game we go out and play, I give myself enough time. 'The only time I will get is by winning football matches, not losing them. 'I know I won't get any time if I lose them. I will then be a casualty like everybody else has been a casualty over the past few years. 'I know the responsibility and I know the only way to make the time I need is to get the results everyone wants as quickly as we can. 'But it cannot always happen. The long-term and the growth of the club is what needs to be tackled now.'' Meanwhile, Newcastle will head off to Austria for a pre-season training camp after missing out on an invitation to the Amsterdam tournament and seeing a proposed trip to South Africa fall through. The club has arranged a series of friendlies against the likes of Hartlepool, Carlisle and Hull, but will also face Celtic and Sampdoria and could also welcome Juventus to St James'.