[Obligatory: Someone is downvoting you, but it isn't me. I upvoted you]
Yeah, I get that. The analytics space is very complex and companies, even ones with good engineering teams, don't have the internal knowledge or resources to typically put all this together.
In addition to working in this space, my copmany helps companies set up their analytics stack.
We typically set them up with one cloud-based data integration tool (the one with the most # of integrations they need at the best price), dbt, and one BI tool (usually Looker or Periscope, in that order). All in, that takes us a few weeks to get them set up and going.
I applaud your effort. I just struggle to understand why you accept punting on transformations (and using dbt (amazing library, by the way - great choice)), but then try to tackle something like integrations or BI tools. The complexity of both of those is massive and there are great open source efforts already out there.
I'm eager to see where this goes.