Creating a 3x3 videowall using Eyefinity and 3 TripleHead2Go's

Hi there!

So for a theaterplay about gameculture I need to make a videowall that can play low setting, 30 fps-ish games. Ideally I want to make it even bigger(like 12 or 16 screens) but i'll just start with the minimum of 9 I have in mind to keep thing (relatively) simple for now. My idea is to use 3 TripleHead2go's SE connected to 3 DP ports on a Radeon 5700 XT. I will then merge these displays into one giant display using the Eyefinity technology from AMD. This way I think I can fool the PC in thinking it has 3 superwide displays instead of 9 seperate and thus exceeding the maximum of 6 displays Eyefinity allows.

Now, in theory, this should work I think, but before i buy all these things i have a couple of questions..
- The resolution of my 3x3 grid is 5.940 x 4.320. Well within the range of the maximum resolution allowed by a single Eyefinity Display Group (8.192 x 8.192) and within the capacities of the 5700 XT (7680 x 4320 ). Is it possible, if the gaming is not optimal, to downscale this resolution with Eyefinity or with the Matrox itself to get better performance?
- And is it, by that same train of thought, possible to downscale the whole video wall? If this is possible i can add even more TripleHead2Go's. ( I don't care if all displays don't show 1080 x 1980) It would be amazing to get the maximum of 18 screens ( 3 MST 1 dp -> 2dp hubs, 6 TripleHead2Go's).
- Is there a better way to get a 9-16 screen videowall in the same budget. Right now i'm looking at a price (screens excluded) of around € 3.180 (computer, triplehead2go's, cables, etc.) I've looked at everything from NVIDIA mosaic to Raspberry Pi video walls to Lucid Hydra, but maybe there's some simpler solution i'm not seeing..

I would reaaly like to know more information about this all so if you know something about setting things like this up, let me know, anything helps!

Thanks in advance!