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You must put some money down. In order to make your Offer legally binding it must have "consideration" = money.
With that being said - there are 100% finance options, depending on your credit. They involve 2 loans 70/30% or 80/20% to avoid PMI there are also USDA loans of 100% depending on location and availability of USDA funds.
Please give me a call at 978-337-1237 and I will be happy to send you in the direction of a couple loan officers to speak with.
If you're not working with a Buyer Agent, I live in Leominster and do cover West Boylston as well.