Yes, moving a piano often causes it to become out of tune, even if you're not moving the piano very far. One reason is that any temperature and humidity changes can affect a piano's tuning. Additionally, the bumps and jolts from a moving truck usually push a piano out of tune. 

However, don't jump right to tuning it once the piano gets to your new home. Instead, it's best to wait at least two weeks for the instrument to acclimate to its new environment. After a couple weeks, you'll get an idea of what the piano will really sound like in its new home, at which point you can call a piano technician to get it properly tuned.

No, not tipping movers isn’t considered rude. Tipping is optional, not expected. There are plenty of alternative ways to show your appreciation without tipping.

Moving a washer and dryer can be difficult due to the appliances’ weight and size. If you need to move these appliances up or down stairs, then it will be more challenging. It also depends on the type of dryer you have, as a gas dryer is more complicated to disconnect than an electric dryer. The difficulty of the task also depends on whether you’re easily wheeling the washer and dryer up a moving truck’s loading ramp or lifting them yourself.

Moving straps like forearm or shoulder straps can usually support up to 800 pounds, sometimes more with specialized straps. However, that doesn’t mean that one person can always lift that much weight, just that the straps are rated for that amount. For example, some straps require two people working together to balance the weight of the heavy item.