NO. Not the 120v anyway.
Not good for metal parts in the tub, this is not like a pool that has the salt to chlorine generator. You need to treat this water for a balanced pH, chlorine and alkalinity.
The steps range in cost from $76.00 to $81.00 not including the tax of course. Depending of the site you are purchasing it from. Average height is 28 1/2 inches wide and 14 inches high.
It needs to be on a flat surface, pavers and gravel are NOT good because when the water goes in, the people go in and the weight shifts, the pavers and gravel can move. Concrete is good but a bit expensive and might result in permits depending on the city of where you live. There is a cheaper alternative, EZ Pad. Google it and you will see all folks use it underneath ho tubs to even out their surface.
Yes, the weight is correct.
Check the manufacturer's web page http://aquarestspas.com/product-tag/filters/
The spa weights 295lbs + 240gal of water (8.3lbs/gal)=2,287lbs + wt of people. You could be looking at over 3,000 lbs, loaded. 70% of the weight is concentrated in the foot well. The manufacturer says figure on 75lbs per sqft. I'd go with a smaller spa especially if the deck is only supported by 4x4s at the edges. http://www.homedepot.com/catalog/pdfImages/1c/1c24f915-88d8-41c3-b1ec-b0a2edfc6452.pdf
According to HD webpage the only option is shipping to your house (or jobsite), curbside is $55. Delivery looks like about 30 days from order.