V3 of LOKI white paper to come. It's much great for LOKI community, paricularly for someone who would like to invest money into LOKI and waiting for more good things released.
We are waiting for more details in V3 of the whitepaper (which is on its final edit stage now and should be out in a few weeks).
Predicted collateral of LOKI service node is 10k or more than that. Personally, it is not too high for such good project that has bright future with proficient team.
What we know so far is that the required amount will be more than 10k LOKI. Also note that the collateral requirement is dynamically adjusting meaning in relation to blockheight the collateral will go down.