I've recently spent time following an excellent Google Docs financial model from Baremetrics[1] put online for free. I'd be remiss not to share here as an alternative. I agree, it does take some time to set up, and monthly some work. I believe founders without a finance background would find it fairly daunting (but can follow along with the blog post).
I think you're offering the simplicity aspect and that's your main value prop being solved. Where do you see the products going in the future? The base modeling I don't think I'd pay for, but curious to see what network or flywheel effects you think might be there for users?
[1] https://baremetrics.com/blog/saas-financial-model#model-temp...