Thanks for the comment. I'm not looking for technical advice on how to implement SaaS. I've done this a couple of times before with various technology stacks.

Thanks for the comment. I'm not looking for technical advice on how to implement SaaS. I've done this a couple of times before with various technology stacks. I'm more interested in how to fund development, and fairly reward backers if the project is successful. What type of agreement can I use to implement this? Ideally, potential clients might suggest and fund features, then be rewarded with a discounted or free subscription.