Portal linking/Nether portals

Can we create our own nether portals and link them together so that we can go the the nether or teleport between our bases without typing commands as people without vip or purchased more homes cant get to their nether bases very easily.

Or we can do something like making a new nether/reseting the nether and if a player has placed a plot there in the last 90 days it saves that chunk and the enabling portals for nether transport things