So you want to expand a mining project, may I know if you are sound enough to do that. Where is your location based, cause it's not that easy to mine coins and you are offering as low as 600$ that's like 200 - 300$ less per current price. Will you be able to hold a escrow for this service, it's difficult to believe you will be able to deliver at so low price. You will have to back up a lot of proof for people to be keen to invest in you.
Our base of operation is in the Columbia basin located in Central Washington State, where power expenses are very low. As a perk to our backers, we are offering the bitcoin near the operational cost of our mining. Please visit our website for complete pricing, as you can get Bitcoin as low as $440.
As for escrow, the crowdfunding campaign will be done through Indiegogo, as a fixed amount. Therefore funds will not be released to us unless and until the project is completely funded. If we don't reach the funding goal, then the money will be returned to the backers by Indiegogo.