The problem with this, IMO, is that in a few years the ASIC's will still be profitable to mine on (They take less than $3 a year), and the FPGA's won't.
I would give you one for this at most, but someone else might do more. It's just not worth it for me.
I'd be I think willing to do 2 of them for a little cut in the hash rate or if you would do 3 I would send you the fpga + 1 BTC towards it if your interested in that send me a PM