$100,000, and zero real property means zero
A special path just for a sole-heir surviving spouse
When the surviving spouse is the sole devisee or heir, Idaho Code §15-3-1205 lets that spouse file a verified petition with the same effect as a formal decree determining distribution — but the trade is real: the spouse then assumes liability for any indebtedness that might be a claim against the estate, and there is no administration.
Community property skips the question before it starts
Idaho is one of only nine community property states — half of all community property belongs to the surviving spouse by law and doesn't pass through probate at all, regardless of what the small estate affidavit itself allows.
Sole-name real property needs one of several other paths
Sole-name real property generally needs a probate, a summary administration, a community-property heirship determination, or another court process — the affidavit was simply never built to reach it.