I think it will work out the way I am thinking, although probably not expressing well. I just got to watching youtube videos and it seemed everyone covered their entire liners with rock, which I would rather not do, and that got me thinking in another direction about keeping the bottom clean.
I like your Green and Black ones, I haven't seen that variety. The ones I have been raising are definitely a different variety than most. The ears stand upright and are almost like "waxy", The tank, like you mention, would also allow for plant growth, which as you can see I enjoy
Not sure what it's like in VA right now, but we are just coming out of a massive drought. I bet we have gotten 8-10 inches of rain the past 2 weeks so the dig should go a lot smoother! I would like to get it done soon because the local craiglist is filled with people dumping big kio cheap right now and wanting rid of plants which I'll set up an inside tank for.