Gaelforce I was thinking 3-4 months would be too short a time to rent out your property and rent one in the other country. Same if you rent in the UK as most contracts are for six months.
If you have school aged children I can't begin to imagine how you sort out schools in both locations.
Unless you're retired and even if you WFH I would have thought it would be unusual not to have to visit the office for occasional meetings.
Not sure what you do about paying tax in the other country if you do work.
Having said all that if you're retired, can afford to leave your UK accommodation empty for the period and rent in the other country, have no school age children and are retired. go for it.
The only other thing is, if the country is in the EU, you may want to wait until we are finally out of Brexit to see what restrictions, if any, will be placed on moving there, albeit temporarily.
Don't want to be a party pooper, these are just some of the things that crossed my mind.