Getting around Singapore is not difficult. With a convenient MRT (Train) system, you can get to anywhere in Singapore via the MRT. If you get really lost (highly unlikely), the taxis (or Uber/Grab) are not too expensive.
The Event Venue is conveniently located within the city centre of Singapore, and locating it will not be difficult.
There are a wide range of accommodations available. Whether you are on a budget, or willing to shell out a bit more dough on somewhere nice, there are places to stay within the Event Venue radius. Just a short 10-15 minute walk/train ride from the venue will get you to somewhere within your accommodation budget for sure.