I have some HD casters on a 12" Powermatic TS
Even with the best casters, 3" diameter it is difficult to move the 900 lb saw. They need to be larger diameter for ease of movement. They also get in opposing positions and you have to use some heavy hip action to get them all lined up. I like your rail idea, but I don't know about the solution without a sketch. If it's 4 wheels in a valley or like a portable bandsaw on angles it may work just fine. Whadda ya have in mind?
The post above talks about noise:
"As far as the noise goes, I can't imagine an induction motor run planer would out out more noise than a chooses. The universal motor in most planers is responsible for most of the noise, same with the chopsaw" ???
An 18" planer will certainly have an induction motor, but that is NOT the source of noise. The knives hitting the wood surface is the noise generator. I have 3 planers , a 12" bench top, a 13" - 3 HP and a 15" - 3 HP. The little one is the most noisy, but not by orders of magnitude.
They say that the spiral cutterheads reduce the noise factor, but I can't vouch for that since mine are all straight knives. Trying to reduce the noise by adding sound deadener may work to some extent, but it may prove costly for the amount of benefit ... I donno? Noise is transmitted by direct contact/vibration and through other mediums by acoustics.
My suggestion is to confine your planing operations to "off peak" times when it won't disturb the old folks. :smile3:
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)