Playing the "other side of the coin" (pun not initially intended), I do know of coaches who have taken pay cuts to have the chance to run their own program. Sure, it's rare, but it does happen.
If that's even a small part of UMaine's pitch to Barr, they might as well not even bother.
This is a guy who has been part of building up three (3) eventual NCAA D-1 champions - Union, PC and UMass. This is not some desperate, ambitious, unknown assistant, who would crawl over broken glass to just snag the first D-1 job that comes across his plate. He helped build Union towards a D-1 title as an assistant, but was already at Providence doing it again by the time they won it, the pattern repeated itself at PC and then he was off to Western Michigan (where they improved, but won nothing) again as an assistant with an already-impressive resume, and finally he was still patiently working at UMass as an assistant when they rose to prominence over the last several seasons. If he was the desperate guy who would agree to a pay cut after doing his little "assistant wins a D-1 title" trick for a 3rd time, he surely would have done so much earlier. It's not like there haven't been dozens of openings since he left Union, but here is he, comfortable being the lead recruiter still.
He's been doing it so long at this point that he may be quite content to be a #2 guy as a lead recruiter for his entire career. And if you're looking for precedent for that unusual, less ambitious career path, you need look no further than this guy who was satisfied to fill exactly that role for UMaine for 25-30 years. Grant someone-or-another, I think it was???
There's a much better chance Barr decides to "do a Grant" if he's sold on UMass/Carvel and his long-term role there, rather than agree to take the UMaine job (or any other D-1 HC job) for a pay cut. The good news is, I'm sure as low as UMaine's budgeted HC salary would be, it's gotta be more than Barr is getting paid as an assistant out in Amherst now.
Again, based on his actions over the better part of the last decade, Barr is not some guy who appears in any way desperate to grab the first D-1 job that opens up. It sounds like Ellsworth has applied for more HC jobs during his relatively short stay at Norwich than Barr has during a much longer run from Union to the present. My point, I guess, is that if anyone seems to fit your "wants a D-1 HC job so badly he'll take a cut" scenario, it's way more likely going to be Ellsworth or someone like him than it would be Barr. Maybe if Barr had some special connection with UMaine, that ship might sail? But if Leaman is that "special connection", I think it's a very tenuous one AND keep in mind, Barr left Leaman/PC to go to Western Michigan.
I'm not saying Barr is absolutely not coming to UMaine. He may well come, but it won't involve a pay cut, that much I can assure you. His track record is that of a guy who is very comfortable being left to recruit and be a #2 (or earlier a #3?) to do something he apparently really loves doing. The "ace in the hole" for Barr coming is that he seems to move frequently, and his time in Amherst may be approaching his prior thresholds for moving on to the next job. On the other hand, he's not going to have the same budgets he's enjoyed at those other schools, so even beyond salary, his ability to recruit like he has previously would likely be restricted, too. UMaine's best shot is if they're lucky to be the right job for Barr at the right time. He's appeared to have been a very patient guy, when many others in his shoes may have reached to be a HC much sooner.
I figure there is a 10-15% chance Ben Barr is the HC of UMaine by this time next week.