When it comes to the final finishing, western kitchen, curtains etc I found that it was best to take the lead as the average Thai has very little experience in furnishing western style, which is quite understandable if they have lived "Thai style' all their lives, if they have been bought up in a western environment obviously a different story, as an example I wanted an oven in the kitchen, wife agreed but stated i had best choose as Thai people have no idea about ovens as they are unaffordable to the majority.
Moving along nicely now, April/May are the hot months, given the job list you have given yourself be better off moving in once its cooled down a bit

Cheers