Even with bottled water people are going to see what you’ve got in there as you’ll need to keep the garage door open during the boil and you’ll need the copper near the door to get rid of the steam.I just like the idea of using the garage because it’s going to be dead space otherwise. I don’t really have a lot of possessions to need to store in there as I live in my own. It’s pretty roomy in there as well.
Tbf the cheap bottled water idea is a good one. I’ll find a way to make it work.
If you use bottled water you’ll probably need to add some minerals/salts as they usually don’t have the required levels but that isn’t difficult.