There are LOTS of sites that will tell you about the tools required to build a plane. Besides a set of regular mechanics tools, you will need drills, deburring tools, dimplers, bucking bars, sheet metal tools, and a host of electrical stuff.   Oddly enough, folks often forget to tell you about the other tools required: Wood Working Tools.  When building an aluminum plane, you really need a small set of wood working tools. A good handsaw, or better, a circular saw, or better still, a table saw is required to build all the extra stuff you are going to need.  I also suggest a Sabre saw for both the aluminum and for the jigs you will build.  Be sure to keep your wood drill bits away from your metal drill bits. For my belt sander and disc sander, I avoid using the same abrasive discs for wood and metal.

Homebuilt Plan Stand