Hi!
If you have ngrok’s paid version then the tunnel links are permanent, at least that’s what they say, I don’t have the paid version so can’r verify it.

Also in both Ethical Hacking and Social Engineering course Zaid showed how to set port forwarding rules in the router, so just follow the instructions and set port forwarding rules for port 80. Remember you need a wireless adapter attached to kali and connected to the router.
And follow the instructions to clone a website using webscrappbook (this is showed in the Social Engineering course) and put all the files in the html directory so they are showed when reaching apache server.

Greetings!
Diego