If you don't try to overgear yourself, 3 days for rests are enough (some play without rests and it's fine), especially since no one is forcing you to play strictly by the rules; everything can be discussed before the game. If it's tournament play, it's harder; in such cases, you have to rely on oppa (if according to the regulations this block isn't counted as a block, and it can't be broken through with acceptable losses).

Did you just make this up yourself? There is nothing like that in the rules.

You need to read the rules carefully; if anything is unclear, you can always clarify. I also got into trouble like that once in a tournament with Dimension Door; I read somewhere about 2 Dimension Doors with expert water magic, and after leveling it up, I jumped using 2 Dimension Doors a day—a technical loss, naturally, but it was so frustrating; for the win, even 1 would have been more than enough :(