A community inspired tank is a great concept, LAME!
I say definitely go communal, if possible. Violin mantis are communal as well as the tiny Purple boxer mantis, and of course Ghosts. People in the community, like myself, who would like a communal tank but are unable to, can do so vicariously through your project.
As pets need names, maybe the community can get involved in the naming of the mantids though a vote or poll.
Another idea is to have a web feed
* for us (or the world) to view 24/7. It may be the first and only live mantis cam.
To fund this you could sell raffle tickets. You would get the cash, and a lucky winner or winners get a prize, like some nymphs, an ooth, or a Harley-Davidson (depending on how many tickets are sold,
).
* I have a webcam I am not using I could donate.