Each country you mentioned differs.
The one I know most about is Poland, where there is a very competitive mortgage market. Irish buyers can get non-recourse mortgages (security jjust on the property purchased, no security required over your home or another asset); there are at least 5 lenders who lend to foreign buyers; you can get up to 80% LTV, first 3 years interest only, over terms of 30 years; and you can borrow in Polish zloty, Euro or Swiss francs (at different interest rates) depending on your attitude to currency risk.
I believe Poland is the most straightforward and mature mortgage market of the ones you mentioned.
Denis Cody
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