I have run my blog on Wordpress for years but I am not good enough with html etc… to create the kind of multi-options subscription table that this has plus the mockups were already there too.
I’m not building a business so much as trying to get a bit of a return on my time investment into my hobby so not in the same league as what you want to achieve, I suppose 
Would be very happy to receive more info about your app via private message.