I’d suggest you open the box and just get started. Unfortunately, in the beginning you’re going to have to make that extra trip to the hobby shop now and then but you may also find innovative ways of making use of what you already have. All of the items suggested come in quite handy but what would happen if you purchased all of these items and realized you didn’t need half of them? Even worse, what if you decide your new hobby doesn’t appeal to you anymore. Unless you have no concern about total cost I’d take the purchases slowly and buy as I needed.