Responsible mature woman seeking annexe

I am a responsible, quiet, mature woman with excellent references and I am looking for a self contained annexe, or small flat/cottage in the Glastonbury area, that includes any of the places within 5 miles.
I am primarily looking for a place with good light, so ideally a south facing set of windows or skylights, with country or garden views.
I am embarking on a long term project painting in watercolour the many flowers of the area, so good light is essential. I work in a small format so I don’t need a lot of space, the place can be small, the light and the location are the most important.
I am a very quiet and considerate tenant and I have very good references. I am looking to rent for a period of at least six months, with longer term in mind.
If you have or know of anything that fits this description please let me know! Thank you for reading.