The website says the canopy of white tulle and twinkle lights costs $2,385.
Ficus trees with twinkle lights cost $490 for four trees, $845 for six trees, $1,410 for eight trees, or $1,975 for 10 trees. I believe I read recently that one of the brides here - Pixie08? - rented trees with lights from an outside vendor and saved a bundle.
Also, you don't have to know the answers to all the questions on that planning worksheet right now - especially since only your planner can tell you the actual cost of all these things. You'll have time to answer all those questions at the Planning Session - or in the weeks afterward.
Your wedding planner sends them to you. They are basically just to get you thinking of ideas and to send along ideas to your planner for your planning session but I can tell you that half the time you don't stick with what you put on them. If I looked at my planning sheet now, it would look like an entirely different wedding.
Using twinkle lights and landscape lights to decorate the room will be actually very good for energy conservation but need to check whether it provides proper light or not.