Hi, thanks for the reply and congrats on everything you've built. I am your target demo I think, an early stage startup that's just starting to get traction. I'm expecting costs to increase soon and that's a big motivating factor to getting off Heroku.
So I'm stuck with either doing all this yaml junk myself or something like your solution. But it is definitely not something I would consider if I'm going to run into those escalating costs that you mention.
A gui / guided kubernetes could be just the thing though.