He is in Lakeview's Man Cave. Deposit all his money before doing anything else. ...Those are the notes I left whenever I last saw Lord Haaf-Mersey in Skyrim, which was December 3, 2023. Yes, my Skyrim season starts tonight. ❄ Brr...
Sundas, mid-morning, 19th of Heartfire: He is indeed in his "man cave".
He's supposed to retrieve Nettlebane, to repair the tree in Whiterun. That is one of those quests I've never done, ever, with any character. He's also supposed to return to Froki (whoever that is) now that he's defeated the Guardian Wolf, Guardian Skeever, and Guardian Mudcrab. This leads him somewhere east of Ivarstead. Good thing he's got Clairvoyance to guide him.
Finally, he needs to bring an ancient tome to the orc in the College. Um... see you folks later. Gonna be busy for a while, looks like.
Early Morning: he plays a game of hide 'n' seek with Lucia and whoever the other child's name he adopted is. Anyway, LHM plays the game, but also cheats! He uses Detect Life to find them with ease.
late morning: He says goodbye to his wife, Motormouth Mjoll, and heads to Ivarstead with Rayya the Overkiller. 👧🏿