I've been thinking about something in Harry Potter that I don't see discussed very often, and the more I think about it, the more questions I have.
We know Dumbledore left Harry with the Dursleys because Petunia was Lily's blood relative. By having Harry live with her, Lily's protection could continue through the blood connection.
But here's where I start having questions.
1. Was 4 Privet Drive even Petunia's house?
Vernon was the one with the job at Grunnings. As far as I can remember, Petunia's employment is never mentioned. She appears to be a homemaker, while Vernon is the primary breadwinner.
We aren't told whose name was on the deed or who legally owned the property, so I'm not claiming it definitely belonged to Vernon alone. But if Vernon was paying the bills and controlling the household, what would have happened if he decided Harry wasn't welcome anymore?
2. What if Vernon had kicked Petunia out?
In Order of the Phoenix, Vernon wants Harry gone after the Dementor attack. Dumbledore sends Petunia a Howler, and she ultimately insists that Harry stay.
But what if Vernon had taken a different approach? What if he had kicked Petunia out of the house
3. Why was Dumbledore's plan so dependent on someone who didn't even want Harry?
Petunia resented Harry, Vernon openly despised him, and Harry grew up in an emotionally abusive household. Yet Dumbledore's plan depended on Harry remaining there.
If Petunia didn't own the house, didn't have control over the finances, and could potentially have been forced out by Vernon, how secure was this arrangement really?
And if Petunia could have taken Harry somewhere else, would the protection have continued in a different home? Or was the protection specifically tied to 4 Privet Drive?