I'm not sure what you mean by a "secondary" insurance.
Chiropractic has proven in several studies to be less expensive than many more traditional routes such as outpatient physical therapy
Trackballs are more expensive than traditional mice because they are far less popular. They are a niche market which are often use them their entire lives.
If one is searching for less expensive convertible, used cars are often a wise choice. Used cars can provide a less expensive option compared to new cars, but the buyer must be diligent in researching the cars history to ensure they are getting a good deal.
Medicare should have less restrictions on home health care.
For a less expensive option I use Futuro which are available at most drug stores For a more pricey option I like Tiger Paws
Cruises and Hawaii, neither are the best option for the budget conscious traveler. For a cheaper, and likely more enjoyable option, consider flying to and staying at a less expensive country. Jamaica, Mexico (in Tulum), and Belize are all excellent choices. You could stay at any of these, with flights, for far less than a shorter Hawaiian cruise.
The desalinated water is more expensive but in many countries is absolutely necessary.
Medicare supplement pays part or all of your deductibles and copays that you have with Medicare parts A and B. A "Medicare replacement" is actually Medicare advantage. They are a Medicare option that combines your Part A, B and sometimes part D into one plan that is administered by a Medicare contracted insurance company. Many of these plans have very low or even 0 monthly premiums. You still have copays but they are generally much less than Original Medicare. (If this question relates to United States Medicare, there is no such thing as the concept of "Medicare replacement." I do not see anywhere to add an alternative answer so I put this here just as a warning. In the United States you are either on Medicare or you are not. If you are on Medicare in the United States, you will almost certainly feel the need to supplement it. Over 95% of the people on United States Medicare supplement it in some way. There is a wide choice of ways to supplement United States Medicare. The answer above describes only two of them.
You need special ink and paper to print stickers at home and they are expensive. A less expensive option is getting stickers made at a local print shop or ordering them online.
Most states require either the insurance or a cash bond to be on file with the state. The insurance is always less expensive than the bond but it is an option.
It is not any less expensive, but it isn't any more expensive either.