What makes it more difficult for Lindsey is that he's not the type to sit around twiddling his thumbs. He wants to be active, doing stuff. For him to have days off between shows is hell, I'm sure.
That said, his voice fell apart towards the end of the last tour from what I can remember. Doing the FM shows and the singing at his own concerts may have been beyond him. I guess it depends on how many shows he would have done. I'm sure it wouldn't have been literally the same number of Mac shows.
'Where words fail, music speaks'