Finally, after discussing with the previous contractor, he agreed to take the job, close to my budget. The quotation became cheaper than earlier because I took out some works, not because I ask for a change in material.

What are the things I need to do before confirming? Do I need to make a detail list of the things he agreed to do and ask him to sign, or this is based on trust?

He did give me a quotation, saying doing what, doing what but there are some not listed in it like cementing/plastering the hackings, labour charges for installation of bathroom accesories, moving the ceiling manhole to another location etc. Should I be concern about this?

For the carpentary works, do I need to specify the thickness I wanted for my wardrobe etc? It says melamine in the quotation but not the thickness or the density.

According to the Ikea staff it's LG. I was looking for white, and their white happened to be RM220 per foot run while the rest are RM290. What makes me wondering is why the Ikea price tag says 'Acrylic' top instead of using the word 'Solid Top'.
The 14K++ is inclusive installation and delivery with 10 years warranty. I have just enough cash for the entire renovation including 25% over-budget just in case, but then my account balance will be 

All in all, Ikea is more expensive on tall cabinet, sink and tap price are higher than buying outside while my contractor's quote is higher at the local solid surface (almost 250 per ft run)
Thanks, I'll take note to focus on the main things first. Hmm.. my contractor does use that word a lot... "few hundred only"...