I have an idea for a mod. After the player buys a house, he sends a letter via courier to ma and pa asking them to move in. 3 or 4 days later they appear in the house.

Here's my questions.

How do I make them appear in the right house?

Also do I disable an npc by ticking the initially disabled box? Then adding a script like

1T82Papa.Enable()

to the npc?

How do I make an npc appear 3 days after?

How do I make the correct npc's appear in relation to the player's race?

The rest I can do.

Edit: Forget the last question.

No one can help me make npc's appear 3 day after a quest?

use
registerforsingleupdategametime(92)

onupdategametime()
1T82Papa.Enable()

endevent