Another option could be to go through, CCEDK's bitEUR/EUR pair. This would allow your investor to bypass the potential bts volatility. I think it still suffers from the same liquidity issue, but placing an order at some premium, along with posting in the forum should work. With SEPA capabilities, I imagine this would be convenient for EU citizens on both sides of the transaction. bitEUR buyer deposits money from their bank account, bitEUR borrower/creator gets paid in EUR on ccedk which they can withdraw directly to their bank.
I was thinking more and if you already have such interested investors, you may want to talk to Ronny as well. I believe CCEDK/OL has been adding liquidity to some of their pairs and he may be able to help and come up with additional solutions as well.