Hunter_ :
If it is a good idea, what brands and models do you guys recommend? Is it possible to get one that will work for 20-30 bucks?
Protection is always about where energy dissipates. Always. Either a surge harmlessly dissipates outside the building. Or it hunts for earth ground destructive via appliances. Plug-in protectors can even give that surge more destructive paths through nearby appliances. Devices destroyed by even less transient include the a grossly undersized plug-in protector. That promotes myths and more APC sales.
Surges that can overwhelm protection inside appliances are hundreds of thousands of joules. For example, a lightning strike down the street is a direct strike into household appliances; if that energy is not diverted harmlessly into earth. And that is what one 'whole house' protector does. Divert and remain completely functions. Effective surge protection means nobody even knew the surge existed. But that does not get the naive to promote it.
The numbers. A typical lightning strike is 20,000 amps. One minimally sized 'whole house' protector is 50,000 amps. Why? Because the effective protector must also remain functional after every surge. A typical 'whole house' protector costs about $1 per protected appliance. Is how protection was done 100 years ago. And is completely unknown to a majority only trained by retail advertising.
Your telco, connected to overhead wires all over town, provides no phone service for four days after a major thunderstorm while they replace their computer? Of course not. Well proven protection from direct lightning strikes has been that routine for longer than any here existed. The typical CO suffers about 100 surges with each thunderstorm and no damage. Every wire in every cable connects to a 'whole house' protector before it enter the building. Effective protection because the protector is at earth ground AND up to 50 meters distant from electronics. See that separation? Also contributes to protection.
You do same. First, confirm or upgrade a single point earth ground - earthing that both meets and exceeds post 1990 National Electrical code. Then every incoming AC hot wire connects directly to that earth ground. Not by wire. Otherwise electric power would fail. Connected to earth via a 'whole house' protector.
Only more responsible companies sell these well proven devices. General Electric, Square D, Intermatic, Keison, Siemens, and Leviton are but a few. The Cutler-Hammer solution sells in Lowes and Home Depot for less than $50. How much were you going to waste on a plug-n protector that does not even claim protection? That does not make the always required short connection to earth? That will not even discuss earthing? That claims to make energy just magically disappear at $30 per appliance?
An effective 'whole house' protector is protection for everything for less than $1 per appliance. What appliance most requires protection during a surge? Smoke detectors or fire alarm system. Only a 'whole house' protector also protects them.
This is knowledge routine even 100 years ago. Only the few who actually know electricity would know about the well proven and superior solution that also costs tens or 100 times less money.
As stated in the very beginning - protection is always about where energy dissipates. Always. No protector is protection. The 'whole house' protector is so effective because it is distant from appliances AND makes that always required short connection to earth. How do you make that protector better? Upgrade earthing. A protector is only as effective as its earth ground. A damning requirement that all scam plug-in protectors must not discuss to protect those massive profit margins.
Where does energy harmlessly dissipate? Provided are sources, from responsible companies, that are selling effective solutions - well proven even 100 years ago - for tens or 100 times less money. What do munitions dumps use to have direct lightning strikes and no explosion? Better earthing and 'whole house' protectors.
Go down to the store and touch it. For most, nothing here will make any sense until you touch it. Ignore those plug-in myths - a $3 power strip with some ten cent protector parts selling for how much? Effective protection means the rare surge does not overwhelm protection already inside every appliance. A protector is only as effective as its earth ground.