Thanks Roman, your solution did the trick.
I took your idea one step further though. Once I added the custom property Mem.VMOverheadGrowthLimit = 0 I then disabled the check in the host profile.
In the VI client go to Host Profiles,
Right click on the host profile that you added the custom property to
select "Enable/Disable Profile Configuration..."
Navigate to Advanced configuration optoins and uncheck the custom profile "Mem.VMOverheadGrowthLimit"
Rescan the cluster and all is good.