I have a good stone and a home made strop to sharpen my exacto blades. I once built 4 planes and covered them using the same two blades. I only toss them when they fall off the bench and bend the point. I get and keep them sharper then when new. When covering I strop them the first time I feel a tug when cutting the covering.
The Up-Roar is a complete kit so you only need the basic tools. I almost never use my scroll saw with a kit but I do use my belt sander. I bought it for $8.00 at a cheap tool sale years ago. Made in China and I had to drill new holes to get the motor moved back far enough so the belt engaged. It works just fine with balsa and light ply. With a kit a home made sanding block works just fine. I belong to a wood working club so even my sanding blocks are free, I make them from scrap wood blocks. I just glue the sand paper onto both sides. When the paper is dead I just toss the blocks.
Too many people worry about the tools. As Bob mentioned, I have some top of the line best you can buy hand tools but I use more of the cheap Harbor Freight tools. My hex ball drivers are the good ones and I have some outstanding JAS screw drivers I use more then the SAEs.
I have been building for years and I build a lot so I also buy my small 2-56, 4-40 and servo screws in bulk from Micro Fastener. I buy 400 hex head servo screws at a time and am surprised I have to buy them every couple of years.
For now you just don't need a lot of stuff to build.