I'm pretty sure the safety side has been pointed out enough for you to make your own mind up. I can tell you now we as a forum would not condone such a set up. Find another type of thumper, you said you had till next Feb. I would use this time to find or build some stainless or copper thumpers if this is the way you want to go. Take a look through the pot still section, there may be a few in there to give you some ideas.
Personally I can't see how that setup with 12 or so thumpers would even work. The amount of passive reflux on all those jars would be huge and the long arms between them. I would've thought they would fill up in no time? The amount of power you would have to throw at that to get it to run properly would be huge I would imagine? Who knows maybe they work? All I know is I wouldn't like high proof alcohol hanging that far off the ground held by a tin thread especially once full of berries and alcohol.