i also think if you have space on the floor or rack already to organize your boots, a number of portable boot dryers that blow air go in your boots with a power strip ie a solid option.
E.g. see thermic refresher / snapdry for examples.
The benefit of a unit that goes in a standing boot is it is less hassle than upsidedown boots. If you also buy half the units; this style also makes it easy to pull the lighter dryer out out of 1 pair and plop them into another pair versus having to handle and rack boots and getting dirt everywhere.
Plus as portable units you can also take it for travel.
Downside is these smaller units maybe somewhat pricey for what you get and they will eventually get noisy or fail.
E.g. see thermic refresher / snapdry for examples.
The benefit of a unit that goes in a standing boot is it is less hassle than upsidedown boots. If you also buy half the units; this style also makes it easy to pull the lighter dryer out out of 1 pair and plop them into another pair versus having to handle and rack boots and getting dirt everywhere.
Plus as portable units you can also take it for travel.
Downside is these smaller units maybe somewhat pricey for what you get and they will eventually get noisy or fail.