Build a rolling box for lift to sit on. Be the easiest way to do it
Exactly what I am doing right now for my 19' ceilings in my house. I am not sure if the Menards lift would actually reach 17' either. I did a lot of searching for a tall lift and everyone I came across would reach 16' with the 6' extension.
Table worked out great as I finished my ceiling today except for one small strip. It is 6'x8' and 4' high. I made it that big so the sife and I could get the sheet on the table. Then we both get on the table and lift it onto the lift. From there, the fun would start.
One note about the lift extension, it reduces the lowest height it will go as well. Makes it too high for one person to try and stick a sheet onto the lift. What ever you do, be careful.