Creating a COIN on top of Ether to raise Capital for a real estate investment project

So my issue is as follows:

Theirs a 1.3 million dollar property. I want to buy and convert into a hostel.

The bank is putting up roughly 70% or 910,000 USD

i'm putting up 200,000 USD of my own capital.

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That still leaves me short 190,000USD plus another 100k in renovations.

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So I need to raise about another 400k USD.

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Would it be possibly to do this via a coin offering that represents a loan term thats pegged to the dollar ? and is in the confines of contract law.

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Any thoughts on this would be amazing.