A:AnswerMaureen, The MTM65PL-S does not come assembled, the instruction manual can be found in the "Manuals & Guides" section of the product page along with the product sheet with all the dimensions. The base is 32.9" wide and 28.5" deep. Please email us directly if you have any other questions.
The MTM65PL-S cannot rotate on-the-fly. You can install the TV in portrait as long as you do not exceed the maximum VESA size. Feel free to contact us directly using the support button on our website if you have any additional questions, thanks.
As long as the carpet isn't plush it should roll well. If you have deep carpet the MTM82PL-S would work better since it has larger wheels. The MTM65PL-S can hold up to 65" TVs, the title has the correct information. Feel free to contact us directly using the support button on our website if you have any additional questions, thanks.
A:AnswerSandy, The MTM65PL is height adjustable to put the center of the TV mounting plate between 40” (1 m) and 60” (1.5 m) The actual height of your TV, and where the VESA holes are located on the TV will determine the height of your TV once on the stand. The measurements we make are from the floor, to the center of the mounting plate. Please email us directly through the support button on our website if you have any other questions and we'll be happy to help.