Horizontal artboards or grouped in Indesign?

If you don't need more that 10 pages in a row (maximum spread page count), you could create a document like the one below. Personally, I would just get used to the way InDesign works.

Hi,

hm, let's try another thing:

Add a second layout window to your document, so that you can do different views on the document at the same time. One layout window with a small zoom factor as the Overview Window and another one with the actual size if your screen estate permits as the Working Window. Perhaps with the Pages panel open as well. Just like that:

Now you can scroll through the spreads of the Overview Window with the small zoom factor very fast.

If you come to a spread that you want to work with in the Working Window, just click the pasteboard of the spread in the Overview Window with the small zoom factor.

To synch the active spread to the Working Window, run a script in your Scripts panel that you can also access with a keyboard shortcut. The script will change the active spread of your big layout window, the Working Window, to the active spread you clicked at in the small layout window. The script will also make the Working Window the active one.

Below the ExtendScript ( JavaScript )-code together with some comments:

/**
* @@@BUILDINFO@@@ SynchActiveSpread-of-WorkingWindow-to-ActiveSpread-of-Overview.jsx !Version! Wed Jan 08 2020 19:15:20 GMT+0100
*/

/*
	ExtendScript (JavaScript)-code posted by Uwe Laubender at Adobe InDesign Forum:
	
	Horizontal artboards or grouped in Indesign?
	paulab39456641
	https://community.adobe.com/t5/indesign/horizontal-artboards-or-grouped-in-indesign/td-p/10843168
	
	
	Have two layout windows open for the active document.
	1. A working window where the zoom factor is large
	2. A overview window where the zoom factor is smaller
	
	Run the script to change the active spread of the working window
	to the active spread of the overview window.
	
	To change the active spread in the overview window with the small zoom percentage:
	1. Activate the overview window
	2. Scroll to the spread you like to work with
	3. Click to the pasteboard of the spread.
	
	Then run the script code below.
	You could attach a keyboard shortcut to the script when installed and visible in InDesign's Scripts Panel.
	
*/

( function()
{
	// If no document is open, do nothing:
	if( app.documents.length == 0 ){ return };
	
	var doc = app.documents[0];
	
	// If the active document is not showing in two layout windows, do nothing:
	if( doc.layoutWindows.length != 2 ){ return };
	
	// If the zoom factor of both layout windows are the same, do nothing:
	if( doc.layoutWindows[0].zoomPercentage ==doc.layoutWindows[1].zoomPercentage ){ return };
	
	// If either of the two windows is showing master spreads, do nothing:
	if( doc.layoutWindows[0].activeSpread.constructor.name == "MasterSpread" ){ return };
	if( doc.layoutWindows[1].activeSpread.constructor.name == "MasterSpread" ){ return };
	
	var overviewWindow;
	var workingWindow;
	
	if( doc.layoutWindows[0].zoomPercentage > doc.layoutWindows[1].zoomPercentage )
	{
		
		overviewWindow = doc.layoutWindows[1] ;
		workingWindow = doc.layoutWindows[0] ;
		
	} else
	{
		overviewWindow = doc.layoutWindows[0] ;
		workingWindow = doc.layoutWindows[1] ;
	};
	
	// Synchronize the active spread of the working window to the one of the overview window:
	workingWindow.activeSpread = overviewWindow.activeSpread ;
	
	// Make the working window the active one:
	app.activeWindow = workingWindow ;
		
}() )

Regards,
Uwe Laubender

( ACP )

There's no built-in way to change the display of single-page or facing page spreads. Besides scrolling or using the Hand tool, I will jump to a different page using the Cmd/Ctrl-J (Go To Page) command or the Page menu in the status line at the bottom of the document window. You can also zoom back and the zoom in to another page. 

You can arrange the pages horizontally in the "pages" palette, but I see no way to arrange the actual page that way, even by reducing the pasteboard.