so... yeah. can i still get the house, i completed one for my baby so i cant talk to jeannie may.

After she is dead, go talk to the guy running the store in the dinosaur. He will give you the key for free.

all i can do is play caravn or buy from him.

Do Repconn quest and also the quest for the Brahmin rancher whose cattle is being attacked at midnight. It will raise your reputation in Novac and dinosaur shopkeeper will give you the key as a sign of town's friendship.

He gives it to you even if you've already purchased the room from Jeannie suggesting it's meant exactly for situations like yours.