This is West Rose Barn. It's in Red Roses, Carmarthenshire. It's detached, in a little courtyard with other barn conversions. There are fields around it with cattle grazing.
It sleeps seven. Three bedrooms, each with its own bathroom. It's got a 5 Star rating, so it's well-equipped. It's all on one level except for one bedroom which is up some stairs. Those stairs are spiral and a bit tight, so just be aware.
The place has a patio and garden for you to use. It's got everything you'd need: WiFi, TV, dishwasher, washing machine. Bedding and towels are included. There's parking right there.
You're about five miles from the coast. Tenby's the main resort there, good beaches. You can get boat trips out to Caldey Island from there in summer. The closest beach is about four miles.
There's a pub that does food half a mile up the road. For days out, Folly Farm and Oakwood Theme Park are popular with kids. If you like gardens, the National Botanic Garden of Wales and Aberglasney are within half an hour.
You're well placed for the Pembrokeshire Coast Path if you're walking. For local information, the Pembrokeshire Coast National Park Authority site is useful. Also Visit Wales for broader ideas.
No pets allowed, I'm afraid.