Whether talking about a whole-house central vacuum or a portable vacuum cleaner, the expected cost of major repair work should always be balanced against its replacement cost. However, excluding high-cost motor replacements or major electrical trouble, repairs on a central vacuum system are typically far less than the cost of purchasing and installing a new one.

The disadvantages associated with central vacuums start with cost. They are expensive to install, especially in existing homes, as retrofitting requires opening walls. The system's bulky hoses can also be inconvenient to maneuver and store compared to portable vacuums. Additionally, repairs may need professional service, adding to maintenance costs. Lastly, while powerful, they may be overkill for smaller homes or apartments, making the investment less practical for some households.

Technically, yes, you could install a central vacuum system on your own, but it is a very difficult DIY. There is a significant amount of planning, cutting into walls, and electrical wiring work that goes into it, which should only be performed by a professional. Because of the difficulty and expense associated with a central vacuum system, it’s worth it to hire a professional company familiar with the installation's complexities.

A central vacuum system can be a worthwhile investment depending on your needs and budget. While the upfront cost is higher than a traditional vacuum cleaner, it offers significant long-term benefits. These systems can save you time and make cleaning your home easier, as you only need to carry the hose and vacuum head, eliminating the need to lug a heavy unit up and down stairs. They also tend to operate more quietly and can improve indoor air quality. The convenience and performance over many years may make it a valuable addition to your home if you can budget for the initial installation.