Domestic Steel Towers provide a large, really safe & stable platform for hedge trimming, tree work etc.
The most useful plan size are the 4' x 4' square towers because they are so much more stable on uneven ground than narrow 2' wide towers.
Simply add some optional adjustable legs or adjustable castors so you can level the tower and with your own reach either side of the tower you can work across about an 8' width before needing to move it.
Illustration shows a Domestic Tower (code DM44/06) 4' x 4' base size with platform height 5ft suitable for cutting heights 8' - 10'. To this basic tower has been added an optional set of Platform Boards and an optional set of 4 Adjustable Bases for levelling the tower on the uneven ground (could have been Adjustable Castors instead).