Picking Python over Ruby for a workflow mapping application?

I want to build in a shortest time possible, a robust prototype of a new kind of work management web application. My invention aims to humanize nonsensical data driven getting-things-done processes like Email, Task Management, Work Management, Projects, Processes, and the like. My invention deals with organizational maps and non-hierarchical networks.

I have not coded for many years (like over 15 years) and happy to consider myself ignorant and a willing learner. I a Bachelors in CS and Math, and was a novice hacker of C++ and C# when I did code.

Personality: played with Mechano and Lego when I was young. I love writing poetry and creating art. I like German cars over Japanese cars.

Important ideas for my software: -Incremental computing -Stream processing -Functional Reactive Programming -Dataflow Programming -Real Time Updates on viewscreen without hitting refresh

I do not need huge data analysis (for now) but lots of just in time coordination updates to multiple parties.

I am considering Ruby/Rails and Python/Django and leaning towards Python. I will code for the first year and hopefully at that time hire chief tech to take over and focus on other things which are my strength. Why don't I hire a programmer from the get go? I just don't want to be handicapped at this time in materializing my idea.

How should I think about this problem?

Thank you for your voices!