They used to be a big club and it's true that if they had the right kind of investment they could be once again. However, they haven't won the League since 1927, the FA Cup since 1955 and have never won the League Cup. In the last 60 years they've won the Inter Cities Fairs Cup in 1969 which they bizarrely qualified for by finishing as low as 10th because the old 'one city, one club' rule disqualified Everton, Spurs and Arsenal who all finished above them. That doesn't make them a big club right now in my book.