A stair runner can be cheaper than a carpet and will definitely save money over the cost of refinishing hardwood floors and stairs. The price depends, however, on the fabric and quality of the runner. A wool stair runner can be more expensive than an inexpensive polyester carpet and vice versa. Keep an eye on your budget, knowing that the higher quality the carpet and the carpet pad, the better the carpet will wear over time.

While it is possible to install carpet yourself, it is a challenging DIY project that requires precise measurement, proper cutting skills, and knowledge of correct installation techniques. The process involves multiple steps, including removing old flooring, installing underlayment and tack strips, and stretching the carpet to prevent wrinkles, which can take several days to complete.

Before starting, consider these factors:

• Warranty: Many manufacturers' warranties are voided if the carpet is not installed by a professional.

• Tools: You will need to buy or rent specialized equipment like a knee kicker, carpet stretcher, and seam roller.

• Complexity: DIY installation is most suitable for simple, straightforward rooms. Projects involving stairs or floor vents are significantly more difficult.

• Cost: While you can save on labor, the cost of tools plus the risk of expensive mistakes—which may require re-installation—can make hiring a professional more cost-effective in the long run.

Given the potential for errors, voided warranties, and the need for special tools, hiring a local carpet installer is often recommended to ensure the job is done correctly and safely.

You can expect your carpet protection to last about six months to two years. It will last longer in low-traffic areas (compared to busy areas, where your carpet experiences more wear and tear). Once the protector wears off, you’ll need to call your carpet contractor to reapply the stain protection treatment and revive your carpet. 

It's best to wait until the newly installed carpet has fully settled and dried before moving furniture back into the room. Your carpet installation professionals can provide guidance on the recommended wait time based on factors such as the type of carpet and adhesive used. Moving furniture back in too soon could damage the carpet or affect its adherence to the floor.