MarcieRae, you are I are in exactly the same situation here. I also have looked at the Hakko system and the price and lack of outside venting is a concern. For me, putting a system through the wall will work because my shop is new construction. I am now concerned with the noise level of those inexpensive dryer vent type motors and the fact that when you remove air you must bring air in also. Fresh shop air is also important!
The conversation is always interesting when we discuss our shop set ups.