the fact your asking answers your question doesn't it.
THe thing you have to look to is the cash flows that the house will generate, be that the annual rent and/or the realisable sale price at some horizion point in the future.
At 10:1 this would give an indication that the rents would be quite low to value, so would you earn more money in a bank atzero risk, or put money into stocks/bonds with a similar risk coefficient.
Personally, asset classes are overvalued worldwide, and if its irish property, I'd run the other way.