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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
The idea behind this is cool, it's a multi-sig contract. another alternative you could consider in the future to try to save some gas, transactions and time is to collect the signatures offline and validate them on the contract, you can recover the wallet address of a signature through code and compare it with the list of admins. Also, you can include the function hash in the signature to know which function call is being approved by the signer, also give the signed approval a time limit and besides that, you can include a nonce on the signature so it can be used only once. This an approach already in existence used by the consensys in their control mechanisms https://github.com/ConsenSys/UniversalToken