Thank for this plan, I needed something in the corner of my living room and this ended up being perfect. I followed the steps for the frame of the bookshelf as the plan outlined but made a few other changes:
1. I put the EMT pipe a bit lower than Ana's plan, more like how the RH shelf looked. I drilled a hole 5 inches from the top of each shelf, and about 3/4 of an inch from the back (5 inches up, 3/4 over)
2. I used flat iron spray paint for the EMT pipe and caps
3. I used caps instead of having the pipe ends sticking out
4. I used 4'' rigid caster wheels, found on etsy for $15 each
5. I used weathered oak stain
6. I couldn't find the right size corner brackets so I bought a 1.5'' wide steel flat bar from Lowes and made them myself. I cut the bar at 6'', put it in a vise and hammered it in the middle to be at 45 degrees, and drilled holes for the screws.
EMT Pipe - $4
Pipe caps - $10
Casters - $80 (including $20 shipping)
Stain - $7
Spray paint - $7
Steel flat bar - $5
Screws - $5
Total - $168