Well, that was sort of my main thought, lots of money, for very little gain (possibly) which might be better spent on a few well positioned autosomal tests.
On top of that, I am pretty much 100% irish in origin, and because my ancestors came to Scotland 200 or more years ago, in some cases, and at least 150 years ago in all cases, I have access to excellent scottish records giving evidence of back in many cases to close to or past 1800 ( especially with Scottish civil death certificates giving both parents details, including maiden names, where known by the informant), and anyone with peasant catholic Irish antecedents knows there is little chance to find written records in Ireland to back up/prove relationships as civil registration began there about 1864 I think (for catholics that is). So I am realistic that I am unlikely to get back much further than I have got. Other than somewhat speculative postulations based on DNA, which absolutely are better than nothing. Lets wish for a miracle, though I cant imagine which direction it is going to come from! DNA i suspect, but other than that i have no idea!
By which I mean, I dont have any real brick walls, other than the great China Wall one we have with irish genealogy!