Template with both top and sidebar navigation

Yes. You can use Custom CSS + JavaScript to do sidebar navigation

I did for a client 2 weeks ago.

@tuanphan Fantastic! Would you mind sharing the code you used to do this just so I can get started? Thanks. 

You can code Sidebar Navigation with HTML (use ul - li tags)

then set transform:  translate negative values or display none

use jQuery or JavaScript to set new class on click. https://www.w3schools.com/jquery/html_addclass.asp

With the new class, you can change the CSS to hide / show as well as create effects for the sidebar navigation.

@tuanphan Thank you. Does this code need to appear on every page where the sidebar with nav should go? I want it on all pages except for Home page and to behave dynamically (similar to the Bedford template). 

you can use CSS body:not(.homepage):.. to hide it on some specific pages.