Dan,
Thank you for taking the time to write your very helpful response. I certainly have more color on how to move forward. I do like the Terribilis quite a bit and have read they are one of the boldest species - I love how their call is loud too!
I definitely agree that setting up the vivarium in such a way that it can be as self sustaining as possible is the best route - I do not mind investing the extra money for less headache/maintenance going forward. I think that I am going to start doing some research into setting up the vivarium first and work on getting the plants all set up nicely for a few months before i get the frogs. I have a background in aquascaping, so building a beautiful planted tank definitely appeals to me.
What size tank would I need to house 4-5 Terribilis? Also, apologies if this has been answered, but do you know of any resources (YouTube channels, specific threads, etc.) that you would recommend to someone like myself for these questions?
Thanks so much again for your help!