Honestly I don't know why you even need a marketing site like this if you are just working on your MVP. I am working on my MVP and am just collecting emails and working directly with potential customers.
You don't need wordpress or any cookie cutter themes to do that. Here is my page: http://adzerk.com - it cost me about $75 with my designer (although the logo design was more).
And when it comes to feedback, the handful of customer I have talked to in person (you know the customer development part) has helped me 1000% more than the hundreds of emails collected here. (most of which will never respond to your email when you send it out).
