Need to skim coat an Artex 8' ceiling (20'x30')and I do not want to buy a work platform -any creative ideas to build one?

 I know it might be a little bit of an open end question. To narrow this down I would mention that I am planning to use some 2x4s that I have laying around and some plywood to build two of the below work platforms. I might add some pads not to scratch the existing hardwood floor but that is the next project for the same room I do not want to buy one of these (the price is good -around 220CAD but it will force me to move very often  I also considered renting a scaffolding tower (33CAD/day) but it is also short and too tall for my needs https://www.homedepot.ca/en/home/tool-and-vehicle-rental/p.scaffold-tower-5.11072.html

This is why I decided to build my own.

Is there a better way to build this ? I need the platforms to be long