De minimis safe harbor range, mult properties

I've been unable to locate these 3 answers.

1. Can I have a rule to depreciate $200-$1,500 for example and take the de minimis election for $1,001 to $2,500? Or does taking the election REQUIRE me to expense everything under $2,500?

2. If I'm taking the d.m. safe harbor deduction under "other" will  my line 14, 15, etc on the schedule E be blank (except for items under $200)?

3. If I have 4 rental properties on my schedule E, can I use de minimis on only say 2 of them?

Thank you for your help.