The cloud mining stuff with the 1-3 year contracts isn't what I'm looking for; I want to be able to place custom orders for as little as 24 hours and cancel anytime like on nicehash.
Thanks!
If this is what you want then Genesis Mining will never work for you. That is more like cloud mining than renting out mining rigs or offer spare hashpower on the market. Plus you'll never make your ROI back and you are not able to choose the coin to mine.
Timerland's right, miningrigrentals should be something you should look into more. They are still active on their twitter and operations.