Get folders size on multiple users

Hi i got a script to find the folder size of multiple users and create a new object with desired properties.

$users = Get-ChildItem \\myserver\homefolders | select name

$outfile = @()

foreach ($user in $users) {

$colItems =  (Get-ChildItem '\\myserver\homefolders\$user\documents\My Music\$RECYCLE.BIN' -force -recurse |  Measure-Object -property length -sum)
$docsize = "{0:N2}" -f ($colItems.sum / 1MB) + " MB"




$o = new-object PSObject

     $o | add-member NoteProperty 'name' $user
     $o | add-member NoteProperty 'docsize' $docsize 

     $outfile += $o

}

When i run it i get an error :

Get-ChildItem : Cannot find path '\\Myserver\homefolders\@{Name=user1}\documents\RECYCLE.BIN' because it does not exist.

I know the folder exists, so why is it failing?

Thanks