......if you havn't made any effort towards saving for a deposit then you have not wanted a property badly enough and/or for long enough.
Either way is bad news for proper financial planning.

To assume that you can get the money back by selling if things go wrong is, considering the sums of money involved, a dangerous attitude to take.

Even without a mortgage, the buying costs of 10% would wipe out any gains for a couple of years - and if the selling costs are similar, then you'll be out of pocket for longer.....

On the other hand, life is short, there's plenty of time for regrets....so go for it.....