Building Marketo Templates
Hi Marketo Users!
I need some help/advice with creating Marketo templates....
I work for a company that has a variety of different brands with very unique branding for each. Our quick-start templates that Marketo created were very generic, so every time I use them to create an email I have to update each individual module to match the brand I am working on. I get loads of email requests so to save time I have been just copying prior emails I have sent that have already been rebranded and just update the copy in the email itself. Which has been fine, but frustrating when the teams request a template that was used months ago and I have to dig through programs to find the correct one.
To save me some headaches I have been trying to create duplicates of the quick-start templates that have my custom branding in them already, and also have many of the modules hidden so I don't have to go through and delete them all every time I use a template. But when I do, I get these types of errors:

Does anyone know why this is happening? Also, does anyone have any tips on how to edit these templates outside of Marketo? I am not an expert coder so I really need previews when I am working in code.
Finally, has anyone worked with good consultants to outsource this? If yes please recommend! I have spent far too much time on this already.
Thanks,
Felicia