Can't say what you're gonna yield, but she looks to have a decent amount of time left on her. Internode spacing varies depending on environment, and genetics. A general rule of thumb is more light intensity and cooler temperatures typically give you tighter nodes to an extent but that's when genetics come into play. Some strains yield great with tight node spacing, and others yield great with longer node spacing. There isn't really a set measurement that could tell you whats "best". Of course a 1ft node distance would be terrible though hahahaha but that's an exaggeration. Just gotta train them or use your environment to your advantage whatever the style may be.
You will soon be entering the stage where the true weight starts to come in. That plant is looking like it will turn out to be some quality smoke. Good job and keep it up! What strain is it?