Classic case startup, 1 biz-dev + 1 techie. The 1 techie gets to be the lone warrior to build the entire contraption. The gut rule seems 50-50, but there are complications with that. What's a better vesting schedule or ownership compensation or way to split this up.
It's a tough call really. I don't have any links handy, but I've read of people in similar situations having the Biz-dev guy throw in some start up funds (or extra funds if both sides are already putting something in). Nothing major ($2-5k maybe), and they're to be used solely for server/software/hardware costs the techie encounters.