I have breadboarded things like ring oscillators before and they work... I certainly wouldnt call them the most precise things in the world but they do exhibit oscillatory behavior.
in my experience parasitic capacitance on the cheap-o run-of-the-mill breadboards is somewhere in the vicinity of 50 pF (+/- 40pF...), depending. since you are up in the nF range you should be safe from those parasitics.
it looks like you have 2 oscillators there, one at a low frequency driving one of a higher frequency. I am not sure why you would want such a configuration? unless the two oscillate at exact frequency multiples of one another you are going to get destructive/constructive interference at the middle node. its tough to tell what would actually happen.
try breaking the node in the middle and measuring what each circuit does individually. can you simulate this?