This question was asked about Watercolor Painting from Photo

we are wanting to have a portrait made for my husbands grandma of grandpa (who has passed) and grandma with their 7 great grandkids. We obviously don’t have a photo of them all together so it would have to be multiple pictures put together. Is that doable? She also doesn’t have a ton of space in her home so would it be doable on one of the smaller sizes? Even more of a minimalist take on the faces so not extremely detailed