A friend of mine once spent four months polishing a fund structure and then realised he could not say, in two sentences, who his investors were. That is the wrong order. In fund management company setup Singapore the regulator cares about your investors almost as much as it cares about you.

Start there. Are you raising from accredited investors and institutions, or do you imagine ordinary retail money one day? The answer shapes the type of capital markets services licence you need, and it shapes how much regulatory weight you carry from the first day. Most first-time managers are better off beginning narrow. You can widen later, with a track record to point at.
Then comes the manager itself. A fund is not the same thing as the company that runs it. The fund can sit in a vehicle of your choosing, perhaps a Singapore variable capital company, perhaps something offshore, but whoever manages the money for others in Singapore generally needs to be licensed or otherwise authorised under the Securities and Futures Act. People mix these two layers up constantly and then wonder why their lawyer keeps asking which entity they mean.
Ask yourself about people too. MAS looks at the individuals: their experience, their conduct history, whether they pass the fit-and-proper tests. You will need a team that can actually run a compliance programme and manage risk without relying on a single heroic person. If you are three founders and a spreadsheet, say so plainly, and plan the hires.
Money matters in a dull, practical way. Capital requirements apply, plus the cost of an office, auditors, administrators, legal fees and the salaries you will pay before the first management fee arrives. Check current figures on the MAS website instead of trusting a number you saw in a forum thread.
Timing is the part everyone gets wrong. Applications take months and the clock includes your own preparation, and not just the review. Anyone promising a quick answer is selling you something.
Write down your target investor, your strategy, and your team on one page before you speak to any adviser. If that page feels shaky, the application will too.