@VictoriaVanDyke
I'm planning my wedding in August 2016 at GRM!
You can visit this site to get a general idea: http://www.weddingsbylomastravel.com/
Pretty much the weddings come with the chairs and tables but everything else you have to pay for. The biggest difference is the cost of food/drinks at the wedding is significantly cheaper than back 'home' (the US for me). DJ is about $1,500. If you want a dance floor it's about another $500 and lights... Those would be the 'necessities' for me but other things will add up.
The site has a lot of info and will help you if you haven't already got the info. Also, we have to cost of reserving rooms up front for $100 a room (which comes back to us of course but another cost).