Harry goes to Diagon Alley and buys a box of broken doorways that lead into expanded spaces via runework. He's going to play around with them, fix/alter the rune work. He has an expanded trunk that he stays in too. He sets his trunk up by the road at one point, near a field or forest.

Also what is the fic where Harry creates a ritual/spell to pull lost money from Digon Alley and gets Gringots drafts too?!?!? This is also Auror's Boys... woops...

Or that fic where Moody raises Sirius, Remus and Harry after going through this witness protection thing with the unspeakables, where they get de aged. I FOUND THIS ONE!!! It's The Auror's Boys by lindajenner. (part of a great series)

Another where Harry's staying in the back room of the Leaky Cauldron, works as a cook? Gets work in the alley. GOT IT!!! Realizations by wishweaver on ff.net. don't know their name on ao3 but know it's there too!

What's the one where Ginny is cheating on Harry with Dean when they're married, and she kills him, only for him to go back in time? Found this one!!! The only sound is the overflow by cartonsofcartoons.