There is an interesting discussion on boards.ie regarding Log Gasifying Boilers. It seems that if you go through all the hassle of buying all the parts direct from the North of Ireland and Poland you can have it delivered for 3,500 euros. You are not entitled to the grant however.
The example quoted is a Atmos DC 25S gasification boiler, 1500l buffer tank, laddomat, thermal
release valve, central heating pump, thermostats, pressure gauge, pump
bypass, associated expansion vessels and fittings delivered for 3,500 Euros.
It is worth pointing out however that there can be significant differences between the expensive and the cheaper alternatives as pointed out further down the thread.
Ir appears to me that this technology may finally be reaching an affordable level.