The intial development of the frame took about 3 weeks of engineering time, about $24,000. This work was beneficial to Decent.xyz which uses it in their developer docs to help more projects integrate with their cross-chain SDK. The next milestone will be adding Polygon-only support, to let users who only have funds on Polygon and not Base to mint. This will require developing a new smart contract since our ERC-721 contract does not allow anyone to mint. The estimated time for this is 2 weeks including testing, at a cost of $16,000.