This is an ancient walled city in Germany, preserved to like it used to be. This colorful watercolor painting looks great with a black mat (making it POP) or a white mat.
Consider a Giclee to save money. These giclees are not just prints -- teu are by a professional printer who specializes in artwork, using archival paper and archival ink. Placed side by side with the original painting, they look virtually identical, so more people can enjoy the same art.
Your giclee can be on canvas and would be framed like an oil painting, not under glass or plexiglass.