You can buy or build something like this out of screen or wire and hang branches. But the buds will not smoke as good as a whole plant that dries slower. Be sure to not over dry the buds.
http://www.hydrogalaxy.com/harvesti...8YjbWe7PHfZgrR5EGdS5GDLYyBe5uA9vITBoCrfbw_wcB
What is missing is how big is your garden going to be? How many plants? What is your general climate like year round?
In winter months, the air cannot hold moisture like in the summer months and your plants will get wet, especially at night, this is what invites mold. You will need to have a great dehumidifier (proper size) whether you are exchanging fresh air or sealing the garden and using CO2.
You will most likely be needing something this size. that can run all night and not get full. Or you can attach a hose and run it to a drain. The small one you listed will not be very effective at all. Growing cannabis indoors is an expensive hobby. You need carbon filters and fans..dehumidifiers..lights..hoods..nutrients..soil. After you get up and running the cost will decrease as you will have most of the hardware paid for.
Good luck!