Run your stuff several times at a local convention.   When I do a playtest, I often bribe with some chow.  Also, I put up lots of eye-catching posters around the con to announce my playtest so I rarely have trouble getting a full table.

Once there, I am much more interested in watching what the players do in the gameplay and how they react to pieces of the game than their post-game feedback.   What excited them?  What rule needed repeating over and over again?   How quickly did the slowest player grok the mechanics?   What part of the setting did they repeatedly refer to among themselves during play?  

One playtest won't answer all you questions, but 10 gives you a solid picture.   As for the text, you need a friend with a good sense of writing and organizing.  

If you absolutely can't gather the right friends, spend a few bucks.   I am quite sure that there are plenty of freelance RPG authors who will give you a detailed review for $50.   Maybe even $20.

Wow, it sure is rainging cats and dogs..

sorry, anyway conventions aren't a possibility.

perhaps i'll just share the ideas here.