As i understood the cost to run a masternode will be 1000 DRK .
1000 DRK is way too high, i understand you ambition but it would eventually prevent a healthy amount of masternodes.
I would host masternodes worth 2000 DRK, i even have the option to provide different IP geo locations, if one masternode costs 1000 DRK to run i can only host two with my budget. NSA can host thousands!!!!
If, say, the NSA can acquire 200k DRK (not necessarily through buying, but by hacking an exchange), then they can either run 200 nodes of 1000DRK each, or 400 nodes of 500 DRK each. It doesn't change the dynamic really for them - except that they'll be running far more nodes thus increasing their probabilities. What changes is that the threshold for smaller stakeholders is lower and thus more people could host nodes with a lesser amount of DRKs. If more small stakeholders go in, then they can increase the ratio of honest nodes vs puppet nodes controlled by single entities.
I brought up the 1000 DRK requirement earlier, Evan said that the price is indicative, not final. Same goes for the miners fee towards the master block.