Cormeen Lodge was perfectly situated for my most recent visit to my family in Monaghan. It's less than 5 minutes outside of Monaghan town and located right on the edge of a public park. It had all the modern conveniences: cable, wifi, security. It has been recently updated so the bathrooms have modern touches as well.
The only downside was the weather lol. We were there for Hurricane Ophelia but thankfully weren't impacted beyond not going out for the day. Hopefully I'll be making a trip next year and I will definitely be checking to see if Cormeen Lodge is available.