Maybe you should reduce your terms then. Say $4K for the MVP if you have to spend 1 month on it, $8K for 2 months.
I believe you also stand a better chance of getting potential "investors" in if you reduce ownership to 15-25%.
This is a very interesting approach to getting rich. I think I'll try it a few years down the line, after getting more professional experience...
Well, the consensus is that the value of an idea is almost certainly zero, so the only way to make it worthwhile is to get one runaway success in a big pool of attempts. Everyone knows the VC version of this approach. This is how it would look like for a programmer. I'm not dead-set on these specific upfront costs and equity split, this is just the reverse of the original offer.