For a request made by a member.
A laser level is a wee bit more expensive but can be had for around $25.00 and comes in handy for many jobs including hanging castle
Click to view attachment
Rebar steaks, a cheap line level and string line around here goes for under 5 dollars and is a good investment to use around the house or garden.
The level in place and you might want to note the bubble which is all most on the level. The string or steak needs to be lowered on the left a wee bit but in this case it's being used to determine the location for a foundation wall and doesn't need to be level yet.