[T. O'Heir]

"...Old Lyman press..." Which one? Some are better than others, but only because at one time Lyman made a press that was not a 7/8-14 thread. All dies are that now.
You need a manual too. The Lyman one is the most versatile. Buy one and read the whole thing(especially the how-to chapter) before you do anything else.
The thing most people seem to forget about is the bench. It needs to be solid and big enough be able to have all the tools, bins, trays, etc, on it while you load.
"...nobody ever saves money reloading..." Reloading isn't about saving money. It's about using the best possible ammo out of your firearms. Reloading lets you tailor the ammo for your firearm.
"...temps working in an attic..." It'll be too hot or too cold. Re-think the whole idea.