As Donna noted earlier, only you can tell what's best for you and doing an extended trip is the best way to get the feel for that.
I recently sold my 13' Trillium
and moved up to a stick built. I towed my Trillium
many thousands of miles and enjoyed it immensely. I had a porta potti but never used it. I usually boondocked and used Walmarts, service centers etc or campground facilities when staying in one.
I made the decision to go RV'ing as well as camping. While the Trillium
was comfortable and had the basics I wanted more. I found it fine as a place to eat and sleep but less than ideal if I just wanted to stay put for a period of time. I moved from tenting to the Trillium and it felt like I had moved into the Trump Tower... for a while.
An extended trip will provide the opportunity for you to consider what, if anything, you're missing and if you can get by without it. Some things are 'nice to have' and they may become 'need to have' after the passage of time.
All the best with your decision.