This is an SSE Conversion of InsideOut by speash.  Permission for conversions was given by the original mod author as long as they are credited (please see screenshot in Images).
Link to the original mod.  Note that all homes have no load door (they're all outside).

What this is
InsideOut takes the stuff you really need a house for right to the streets of the five big cities of Skyrim.
It kinda gives you five playerhouses, but without the walls. And load-doors. I hate load-doors.
You can now just fast-travel to the city of your choice and that's the only
loadscreen you'll see. When you're done you can just fast travel away
immediately. This removes 2 load-doors at least and even more if your house has extra load-doors to the crafting area.
Or even worse, like the three hearthfire houses have a load door between
different crafting furniture...

I chose an un(der)used spot in every city and placed an interior there trying to make it both pleasing
for the eye and convenient enough to not 'need' a player house.

I provided lots of storage (26 containers) all of which are visual
activators so you should immediately see where to store things. Also all storage is shared between the cities, so if you, say, drop off your ingots in Whiterun you can also pick them
up in Solitude, Riften, Windhelm and Markarth. There's 17 designated
containers and also 9 extra you can use at will.

I also re-navmeshed the areas so your followers and other npc's will have no problem getting around the place.

Here's a list of what every interior has:

FURNITURE

• bed
• cooking Spit (Except Markarth)
• Dining Table (Except Markarth)
• Civil War Map (Except Markarth)
• Forge
• Smelter
• Grindstone
• Workbench
• Tanning Rack
• Arcane Enchanter
• Alchemist Table
• Wood Chopping Block  
  

DESIGNATED SHARED STORAGE FOR

• Armor
• Melee Weapons
• Ranged Weapons
• Staves
• Ore
• Ingots
• Leather
• Gems
• Soul Gems
• Ingredients
• Potions
• Poisons
• Scrolls
• Food (Except Markarth)
• Books
• Keys
• Stolen Goods (just shove them under the bed. Trust me. No one will look there.)
  

EXTRA SHARED STORAGE

• 3 City Safes
• 6 Storage Boxes
  

Where do i find all this?
WHITERUN:
You will find your interior right on top of the barracks. I guess this is
your safest house as Commander Caius will visit you every day to make
sure his boys keep you safe. He also seems to be a pretty good craftsman
and tends to sit around eating your food a lot.

RIFTEN:
You'll be stationed immediately to the left when you enter Riften behind Aerin
& Mjoll's house. The small gate is locked from the other side so
the first time you'll have to walk around. This interior also has a
statue of Nocturnal.

SOLITUDE:
Your interior is where they hurt uncle Roggvir, immediately right when you
enter the city. Imagine the warm welcome when you get if you start a new
game.

WINDHELM:
Just like Solitude, immediately to your right up the steps.

MARKARTH:
It was really hard to find a good spot in Markarth to have enough room for
everything so I chose to expand upon it's current crafting area. There
was no room for a bed and breakfast but hey, who wants to live there
anyway. Markarth sucks, I usually avoid it as much as possible. Your
stolen goods are in a treestump behind the grindstone.


Do I need anything besides Skyrim?
Nope


Incompatibilities
Obviously any mod that changes the areas this mod changes.


Known issues
The Windhelm Civil War Map works, but you can't activate the flags due to
it's placement in the wall mesh. I chose looks over function here.


Recommendations
-My Home Is Your Home if you want your spouse or followers to live in your interiors
-A mod like AFT if you think it's fun to watch 5 followers bumping into each other pretending they are actually crafting stuff
-Automatic Item Storage links well with the cloud storage and crafting stations

Installation
-Place InsideOut_SSE.esp in Skyrim\Data.
-Activate InsideOut_SSE.esp

Or just use NMM I guess


Thanks
To Bethesda for making all these excellent games and being supportive in modding them;

To the Nexus community because it provided me with the mods to keep Skyrim interesting for the hundreds of hours I've sunk into it;

To Darkfox127. This is my first Skyrim mod ever, so I had to learn how to use the
creation kit. The Beth tutorials were OK but if there's one person that
taught me a lot it's Darkfox127. His tutorials are really the best, he
taught me how to do this.