It's neither clear nor indisputable. Making NO other assumptions, you have presented a situation where the buyer will need to obtain a 94.5% LTV mortage due to the loss of the equity in their first property. If they had not lost equity in that property they would only need to request a 90% LTV mortage to trade up. One of these will clearly be easier to obtain than the other. That is an undisputable fact.It is a clear indisputable fact that the OP would be financially better off subject to my warnings.
Besides that, your results are totally invalid if you take a more typical mortgage term of 30 years or more (I'm not going to debate whether those long terms are a good or bad thing; they are the reality in Ireland at the moment).
The point is moot if you are unable to get a mortgage in the first place. The chance of hitting negative equity or requiring a high LTV mortgage to trade up increases greatly as the price of your starter house goes down.Cheaper houses mean you pay less if you are buying.
You're going way off topic here. Did I say anything to contradict this?I don't think you or I agree on anything. The reality of the Irish market is that it is seriously perverted and balanced on a mountain of debt. It serves noones interest to pretend that the extreme gearing as practiced in recent years is nothing more than abnormal and courting disaster.