Two different Shopify Stores - Subdomains and Subfolders

[larapretorius88]

I have two locations. 1 in South Africa and 1 in the USA. My primary store (the one I had first) is South Africa www.onlyprohair.com and my US store is new and I made a subdomain for that at us.onlyprohair.com -  Shopify does not allow me to use the subdomain on both stores. The two different stores have different shareholders and owners and can therefor not be on the same shopify account by using markets, the products also differ between the two markets.

My www webpage has a high organic ranking due to my blog and I get alot of web visits from the USA to my SA store due to this. 

I want my Blog, Locator Map, About us etc to be on www.onlyprohair.com - Then is need my south african collections, training, contact etc to be on za.onlyprohair.com and the same for the US store on us.onlyprohair.com. I also need the country selector of the store and auto geotagging to take you directly to the correct store and pages.

I don't even know if this is possible, can someone please point me in the right direction?