Just to get the feel of what you are suggesting I used Griffiths valuation for just one parish
www.failteromhat.com/griffiths/down/drumgoolandBigham Alexander Ballyward Drumgooland Down
Bigham Andrew Ballyward Drumgooland Down
Bigham George Ballyward Drumgooland Down
Bigham James Ballymackilreiny Drumgooland Down
Bigham James Clanmaghery Drumgooland Down
Bigham Jno. Cloghskelt Drumgooland Down
Bigham John Benraw Drumgooland Down
Bigham John Cloghskelt Drumgooland Down
Bigham John Leitrim Drumgooland Down
Bigham Joseph Cloghskelt Drumgooland Down
Bigham Matthew Moneyslane Drumgooland Down
Bigham Samuel Ballyward Drumgooland Down
Bigham Samuel Cloghskelt Drumgooland Down
Bigham William Cloghskelt Drumgooland Down
Bingham Andrew Drumlee Drumgooland Down
Campbell

Drumadonnell Drumgooland Down
Campbell Bernard Leitrim Drumgooland Down
Campbell Henry Moneyslane Drumgooland Down
Campbell John Clanmaghery Drumgooland Down
Campbell John Cloghskelt Drumgooland Down
Campbell Joseph Moneyslane Drumgooland Down
Campbell Patrick Leitrim Drumgooland Down
Campbell Thomas Leitrim Drumgooland Down
You can find the dates within 1845-1865 when it was listed. Notes and maps exist usually.
good luck onwards, Jim