If you want, you can get nutri-drench it does work faster but you should be ok with hydro hen. (Chick grit) there are different size grit. I don't feed anything but their chick starter for first few weeks. Especially not before introduced to chick grit. I don't use medicated feed either. These...
Sounds like you are ready. That temp in garage should be ok with heat plate only. You may use heat lamp also for a few hours just to get them warm faster after shipping or stick them under the heat plate after dipping their beaks in feed and water. As far as bedding I would use the paper towels...
This will work for a short time as they do grow fast. I would be looking for a large cardboard appliance box or other large cardboard box as they are free. Also, you will want to have some type of lid sooner than later, so they don't fly out. Some type of wire or even an old window screen for...