!!!
It doesn't seem like you have read much of the advice on this site from the evidence in your post. You will already know what advice you will receive if you have. I'm not saying that there is anything wrong with your idea, just that I would imagine that under most circumstances this investment would not be advised on AAM.
First, you are right, you could make 20% in 18 months in this fund, but, equally you could make 200% or 2000% and you could lose just as much! No one knows. Any investment expert will tell you that trying to gauge the direction of any economy is impossible (to any reasonable degree of certainty). Hence if you want to gamble your money in this fund, feel free to do so. Its your money and your choice. But it is just that - a gamble, and not an investment (or at least not a balanced/well thought out investment).
If you however you want
to invest then you need to consider:
1. Does this investment help you achieve a balanced well-diversified portofolio? Are you putting all your eggs in one basket?
2. What is your attitude to risk, how will you feel if you are down 20,000 euro after 6 months? 50,000euro?
3. What time scale is most appropriate for this investment? An equity investment lasting 18 months is in disagreement with conventional wisdom. A lot of equity investment looks like a 5+ year timeframe with some people even saying that much longer timescales are even better.
4. Do you need independent financial advice about the best option for this money. Its a large sum by any standards. Maybe it might be better to pay it off your mortgage, pay it into a pension etc etc...
5.
are there other options we are not taking into consideration.
Are you serious? There are even other options within Quinn funds!
Hope that helps.