Today a new bgg design contest was announced:
https://boardgamegeek.com/thread/1437092/2015-16-wargame-print-and-play-...
Looks very interesting to me. I have several mechanics and themes that I would like to experiment with and the deadline is still far away (April 1).
See also the discussion thread:
https://boardgamegeek.com/thread/1435333/would-there-be-any-interest-war...
However you do not need to find many spare minutes per week to get a reasonable (small) game done in 6 months if you have a good idea. My biggest problem at the moment is choosing what project(s) to do. With so few restrictions in the contest there is nothing to guide me in one direction or the other, but I guess I just need to write a list of options and pick one.