Re: New garage panel
100A in the house? Seems a bit light to me, especially if you ever hook up a welder. You might want to consider upgrading the panel in the house to 200A. You'd likely have to upgrade the meter base and incoming lines. If you have overhead supply, the power company will provide that up to the mast; I'd guess the upgrade would set you back $500-1000 for DIY plus whatever for the garage. Double that if you hire an electrician.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.