Email marketing requires a small time investment of your resources, and allows you to send personalized messages. (entrepreneur.com)
You may want to look at a few other tools, which perhaps can get you even more functionality, with little time investment in learning them. (biggerpockets.com)
I say that because your approach is very big on time investment and return on that investment... smallest amount of effort for the largest effect.... (anymanfitness.com)