I reckon then the best thing to do is take €50k p.a as a gift
No - if you are taking an interest in the property, take it as
much in one transaction ( subject to your father being willing to do this and him taking independent legal advice) to avoid annual transaction costs.
As a matter of interest, on inheritance can I pick the estate agent to do the house valuation or do Revenue do it?.
Well, if you are not hitting the tax threshold, you don't need to do a return. To make sure you are corect on values then you should get a written valuation from an estate agent of your choosing - be careful, make sure that they know that their valuation is always open to scrutiny from Revenue. If Revenue are not happy with the valuation ( and at this stage most estate agents are canny enough not to fall into the trap of artificially deflating property values that may be scrutinised by Revenuer) they will have their own Valuation Office carry out a valuation.
mf