Have you tried https://nunchuk.io/ ?

I have started using it to manage small collaborative projects with trusted people. For example, when you want to start a blog, need to buy a domain name, and some hosting, receive some support funds, etc... And want to share the responsibility.

Nunchuk allows the creation of a discussion space with as many participants as required by the "project", then attach a multi-sig wallet to it. You can discuss buying something and the transaction will be posted inline the conversation, executed by the multisig rules of the wallet.

I am going to report on the experience in a bit more detail after we have completed our first collaborative project using Nunchuk, stay tuned ;)