When Marty is viewing Buddy's body in the morgue, there is a brief close-up of Buddy when you can see he is breathing.
At Buddy's funeral service, during Wendy's comments, she says that on the first morning that her husband and she woke up in the Ozarks, they looked out over the vastness of the lake, and there was Buddy, buck naked, staring back at them. The Byrde family actually woke up the first morning at the downscale motel where they woke up for several more mornings while Wendy shopped for houses and finally agreed to buy Buddy's and thereafter moved in. This may have occurred on the first morning that they woke after moving into Buddy's house but not their first morning in the Ozarks.