SP2013 - 2 WebApps on same IP with SSL for HNSC

First a couple things about my environment: - I'm using SP2013 Enterprise on Windows 2012R2 with IIS8

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  SNI isn't an option since I need to support IE on WinXP (plus I believe it needs to be part of the initial IIS installation which it wasn't AFAIK)

  
  


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  I'm using a wildcard SSL certificate

  
  


• I setup Central Administration on port 443 and gave it a URL spca.company.com


• I have a single IP for my APP server and a single IP on my single WFE.

Now I need to setup a non host header web application on which I am going to create an unknown number of host named site collections (HNSC). When I tried to do this in Central Admin I got an error saying this IP and port were already in use. To do this the web app can't use a host header. I want this to be on HTTPS as well. If I can have this on port 80 and still have my HNSCs on port 443 that's an option since I won't be routing people to the root site collection and it will simply be there as per the requirements.

Is it possible to set up a web app on port 80 and have the HNSCs on port 443 while still having CA on 443?

Is it possible to set up a web app on port 444 and have the HNSCs on port 444 while still having CA on 443?

I attempted to use Set-SPCentralAdministration to move it to port 444 and then to 80 but both attempts failed. I'd be game to move CA to port 80 if you know how.

Thank you!