Kites

I'm just getting started into the online-marketing aspect of my work and am now considering even offering my services to others - why?

Because kites makes it easy as heck! It's not 100% fleshed out yet... and in this case that's a bonus! Yes, their awesome support and willingness to help you use their platform well is so helpful that this is probably worth more than some perfectly optimized app.
You are missing a template?
Write the support and they'll make you one!
You need a bit of help with custom code?
Write the support and you can have a chat with one of the Co-Founders!
And Amadeo was a joy to chat with too.

Invest in this software if you want to make microsites easy, you like supporting great founders or you just want an awesome no-code JS/HTML builder in future - because that is their vision.
How cool is that?