Not sure about how good i am in explaining this. I’ll tell you what i think about it and you’ll do your math.
Recently there has been a thread here about advertising vs. aff program business model Located Here
If your plan is to buy a new domain and use the mirror template like it was your own white label.. I think it might work well if you have a lot of traffic to your site and you promote your mirror/white label on your own site.
Frankly speaking, the other option is to set up the mirror as a stand alone website and just wait in vain for it to get reasonable SE traffic while providing the casino free advertising as mentioned in the related thread.
Templates tend to get none to very very little SE traffic.
If you wish to add sites to your portfolio and increase your business visibility/exposure. I suggest you invest a few more hours and build a site by your self.. you will gain so much more. or PM me… I think i can offer you a few more options.
Hope that helps