Hope your garage is air conditioned. I don't think anyone trims pistol brass. Lyman has a little inexpensive kit with a deburr, primer pocket swag and cleaner. I do run that in the primer pocket. Lets you physically check the brass and remove pieces of media that may be stuck. When you do .45ACP it's nice to be checking that primer pocket as there are small and large primer pockets and you need to separate them out.
I have a stainless steel liquid tumbler which I never use but brass looks like new and I have a regular tumbler with corn cob media which I use 99% of the time. I tumble outside though as there is lead dust danger.
Finally you will want a chronometer, a bullet puller (inertia works for me), maybe a balance scale to make your digital is really accurate, safety glasses, a do not disturb sign. Get a notebook so that you can record all of your data for every load you make.
Have fun.
Why do you need a chronometer? What are you timing that needs to be precise???