Default Options for Blank Project

I don't use templates anymore. 
 
I just have blank projects with certain features and I save that as a CWP file. I find Track Templates are way more useful than project templates. 
 
As example I have a song idea, Fire up Sonar, I have set Sonar's file path so that "Open" takes me to the root directory of my DATA drive where all working projects are stored in different category folders.  I have a "Song Ideas"  folder. In that folder is the Project folder called "Song Ideas"  There is also a folder for each new song idea  I've recorded, each named or dated. 
The "Song Idea"  Folder is what you' might call my template. In there is the CWP file "song idea template"  
I open it. 
This gives me the tools I need to lay down a guitar and vocal track. It also has a Hi Hat midi track and Session Drummer already to go as well as an audio Bass track also ready to go. The audio tracks are preset to the audio inputs I normally use etc.  That's right, it's a template, but the difference is it's already a CWP file.That's it. 
Set the tempo and record.  ( or see * below) 
This happens within about 3 minutes of turning on the computer. 
Once done, "SAVE AS" and it will open to the original location.
Browse back one level and I'm now in my "Song Ideas" folder.
Create a new folder and name it (or just date it)  and save the new song in there, done. 
If the song evolves into anything worth while it while be "SAVED AS"  to my "Original Songs" folder. 
My DATA drive has a folder for each category of material. Originals, Clients albums, My Albums, Live Backing Tracks etc. 
When using SAVE AS I use "Copy audio with project" so the audio follows the song. 
If you are worried about the original audio folder taking up space you can go in and delete everything later or-
 
*  you could perform the "Save As" before starting recording which is what I normally do. This creates a new audio folder inside the new songs folder.  
 
So that's just one other way to work, there are many and pick a method that works best for you. Many people get tangled up in Sonars default folder settings. They are easily changed to a system that works better for you..