David Webb and Steve Tilson were more successful and on less budgets
Can't really compare the Webby era then to now in regards to money. Money , especially in football was a lot different than it is now. Also, that era, unless I'm mistaken was before the "out of contract " issues faced by all clubs now, where football clubs had more power than the players did.
In terms of Tilson, yes, his team on his budget was special, especially the rise form league 2,1 to Championship, but look what happened when he was given money . People talk on here as though they would get all the players wanted, within the first week of the pre season and that it's a simple task just because other clubs are getting in 6,7 8 players ... the balance of adding to wholesale changes is somewhat different I would say.
Also finally , some people are alluding to Rons small budget , however when Ron faced Gina is ruin in the infamous season with no wages being played , he was attacked for running the club into the ground. Just shows you can't win really.