Why do you need to set up your own (sub)network? Isn't it possible to use more than one device using the community supplied WiFi?
I currently have a Nighthawk AC1900 that I use with a cable modem supplied by my ISP to set up my wireless devices at home. I am moving to a community that supplies Wifi via a Mac filtered wireless connection. Since there will be no Ethernet connection in my new apartment, How can I set up my own network within my apartment and connect to the wireless signal in this community?