This is pretty typical. By the way, that is NOT a large model. A large model is 900,000 megs. (one of my current ones.)
You need to make better use of layers (sigh…tags)
I use a system similar to what the AIA used to recommend in AutoCAD days.
Example:
A-WALL-INT-EXG
A= ARCHITECTURAL
INT= INTERIOR
EXG=EXISTING
Similarly…
A-WALL-EXT-NEW
A= ARCHITECTURAL
EXT= EXTERIOR
NEW =…NEW 
Similarly, for your Casework
A-CASE-NEW
A-CASE-EXG
OK, so you have all your arch stuff…Walls, Doors, Windows (I use a combo layer called A-DOORWIND-NEW or A-DOORWIND-EXG), Casework, Entourage (artwork, pots and pans, plants, etc)
A-ENTG-NEW…etc…you get the point.
Now…
All your existing stuff, that goes on the A-CASE-EXG layer.
Maybe some of it wants to stay. OK…so it stays in the A-CASE-EXG layer
Then you have another layer A-DEMO-CASE (also other demo layers)
When you know that some cabinets are toast, change them to the A-DEMO-CASE layer)
It will be turned off in every view except demo plans/elevations and exiting conditions.
One cool trick I have come up with to avoid having to recreate all these layers in every new drawing…
Make a “schedule” of layers.
Make a list of layers using 2D text or Flat Text tools (Flat text will burn less memory that 2D text)
Now make a little circle or square…make it a component, because you will be making a lot of copies of it.
So your list of layers, as text lined up, will be like:
O A-WALL-INT-EXG
O A-WALL-INT-NEW
O A-WALL-EXT-EXG
O A-WALL-EXT-NEW
And so forth…with the initial circkle being a physical circle or square.
Make all these layers manually.
Try to keep stuff organized so they all “stack up” next to each other .
(You can use M= MECHANICAL, C=CIVIL, L=LANDSCAPE, P=PLUMBING, G=GRAPHICS, E=ELECTRICAL, as well)
Now, put each little circle or square (and the text if you want) into the appropriate layer.
Got it all? Now make a component of the entire darned thing.
Call it something like “LAYERS TEMPLATE”, and save it where you keep your master files and stuff,
Now, when you open a new drawing…get rid of the stupid Eddy or Suzie…and insert that component.
Just keep it off to the side somewhere.
BINGO! You have all your pre-created layers all set up in your new drawing.
Lock it so you don’t delete the component or any layers completely by accident.
See how that works?
You can do the same thing with all the materials you use…your standard Cherry, Maple, Birch, Dark Granite, Light Granite, and so forth.
Then you will have all your standard materials in the new drawing and not have to go hunt and peck around for them.
To start…I hope you are at least Grouping EVERYTHING. Good!
Now learn to use components. Will make your life and workfklow so much better.
You make a component (or buy) of each type of stock casework. Each size. Save all to a master folder somewhere. the beauty of the components is twofold.
First, your file size will be way smaller and second you have the ability to edit just one of those suckers and they ALL will get edited.
So as you go on, you think, that ogee edge on the stiles and rails looks goofy…I’m just going to model these with a simple chamfer, You edit on of them and they all get edited. Cool. You can also make components within components…so that several components all use the same 16:" door…for example. So if you edit the stiles and rails on the 16" door, ALL components using the 16" door will have their door changed. You can start to get the sense of the power of components.
Similarly, you could have six different door pulls…each a separate component. One is a standard D-pull, one is a bar…etc. Put each of them on a separate layer…A-CASE-HDWE-PULLS- OPT01, A-CASE-HDWE-PULLS-OPT02…etc.
Now, form the master list of layers you can control the door pulls for the entire project. Turn off all of them except for the Option 2 pull. there you go…make a scene with that layer on and none of the others. Since each of those six “pulls” components appear in every single door component…well, you get the picture. It can be extremely powerful.
So to get back to your original question…
This is all done with layers and scene tabs, you can turn all sorts of layers on and off…assign it all to a scene tab and forget it.
Of course, you can also copy stuff off to the side and make separate models.
but then you are going to have to create new elevations and plans because the new stuff is in a different place.
Good rule of thumb…don’t hide anything!!! It’s a real PITA and creates all sorts of headaches down the road. There’s really no reason to use it for 99.99 percent of your work. so don’t.
hope that helps.
Oh one more thing…I probably don’t have to mention it…but EVERYTHING you draw, as you draw, is on Layer “0” or default. EVERYTHING! Why? Because if you deviate from this you will end up in a lunatic asylum sooner or later.
EVERYTHING you draw is going to end up being a Group…or a Component. GROUP EVERYTHING!!! And inside…it’s all Layer 0 goodness.
The only time Layers/tags come into play, is once something is drawn (in layer 0, right?!) and then grouped…that GROUP is put into a layer. This is probably the single most important piece of advice I give to new uses!
Everything is drawn in layer zero
Everything is Grouped.
And make them tattoo that on their forearm.
