Hi:) Explaining grammar in terms of quantity of words is not sensible. You didn't choose the right way to learn grammar. Hourly payment is the right way. I can explain you all the rules, but I am not sure you will memorize them using that method.
I have been tutoring more than 10 years and feel satisfied to be constantly in dialogue with students and help them develop conversational skills. Throughout these years I have come to appreciate the importance of cultivating individual approach to every student, motivating them to love the language, put forth more efforts. I have academic background for other profession as well, but tutoring is my passion. Moreover, I don't quit it because my teaching skills are highly valued by students. I am always able to maintain a high level of communication and enthusiastic spirit during classes:)
Lately I have worked as an interpreter and translator for QC personnel who were originally from Australia, Canada and GB. We made jokes, actively conversed with each other about any topic. They kept mentioning that I sound very native unlike other English-speaking Armenians.
By the way, apart from conversations I would recommend listening to dialogues. It cultivates natural feeling of language composing. Actually, I use very practical methods for my students.