The Hammers were one of the busiest clubs in the summer, signing 12 players in total with a net spend of around £25-30 million including loan fees.
The east Londoners are widely considered to have done some of the best business of the summer overall.
Left-back Stephen Hendrie, goalkeeper Darren Randolph midfielders Pedro Obiang, Martin Samuelsen, Manuel Lanzini and Dimitri Payet and defensive reinforcements Angelo Ogbonna and Carl Jenkinson were all recruited over the summer.
That was before a quite memorable deadline day in east London where no less than a further four players were brought in.
Hull City striker Nikica Jelavic, Barcelona midfielder Alex Song, Chelsea star Victor Moses and Nottingham Forest's exciting and powerful winger Michail Antonio all signed up as the deadline day headlines were dominated by the Hammers.
Beefed up squad is evidence of increased revenue
The former Croatia boss led his side to one of their best ever starts to a Premier League season and they were sitting just two points off the summit after 10 games.
However, a glut of injuries have led to a run of seven games without a win and the club has dropped to eighth as a result.
Whether West Ham are prepared to do more business in the January transfer window remains to be seen.
'It's like having an apartment full of expensive furniture...'
But speaking in his latest column in the London Evening Standard Bilic has been explaining why he thinks the Hammers can start to compete with the top clubs financially... using a rather bizarre analogy.
"The extra revenue that is coming the way of all Premier League clubs means that everyone can compete with the best," Bilic wrote in the Standard.
"The big spenders have always had the money — and now they have more — but there is a limit.
"They can’t buy another seven top players, because they already have them. It is the clubs further down who have benefited most.
"It’s like having an apartment that is full of expensive furniture and 60-inch TVs and then someone comes along and gives you a big wad of cash.
"What more can you buy? You have it already. Someone else, though, who has an apartment but not the furniture can use the money to good effect.
"That is a big reason why the Premier League this season is so tight."
Olympic Stadium factor
Another factor that will help the Hammers - who are officially the 19th richest club in Europe - compete with the Premier League elite is the Olympic Stadium.
It has already persuaded the likes of key defenders Winston Reid and James Tomkins as well as skipper Mark Noble to sign long-term deals with the Hammers.
And players like Dimitri Payet, Alex Song and Angelo Ogbonna also bought into the fact they would be playing in the last season at such a historical ground before moving to their impressive new home.