Hi Amy,
For more details about hotel rates & booking, You might want to book online or via phone. But I believe @ this period of the year You would propably get the room anytime U want. In geylang there's alot of budget hotels which might not be registered online. U can try out your luck when You reach here.
http://hotels.online.com.sg/hotels-50andbelow.asp
Geylang is a fine area & a gourmet heaven, example like bee-horfun, spicy frog porridge blar blar blar. Don't have to worry about your stay in geylang as its still relatively safe (increased police presence there) with survellience cameras in a number of locations. But for precaution, just try not to go out late in the night.
4 bucks will get you a decent meal @ any foodcourts or hawker centre.
For business setup You can actually go to
www.business.gov.sg , its a A-Z guide for business setup in Singapore. For now, I believe You should read up more on entrepass & taxes. If You have any doubt about immigration, You can check out
www.ica.gov.sg .
If You decide to stay in one of e hotel in geylang, You can go get to aljunied or kallang mrt in a 10mins walk. From there, You are only a few stations away from Singapore expo's station. Its less than 4bucks to & fro.
http://www.transitlink.com.sg/images/eg ... ys_map.htm
If you need other information, just let Us know & I believe the folks here would be glad to impart their knowledge

or you might want to visit this website for information about Singapore.
www.visitsingapore.com
adios