I am a student and couldn't afford a BL touch so I made a mount for an Inductive probe.
I have an ender 3v2 - with sprite pro extruder & klipper.

The mount screws onto where the BL touch would normally go. 
I did have to make an optocoupler circuit and tap into my Z-limit switch to get the probe to work but there are videos online on how to do that. 

I had to make a custom Klipper config file.

Here is the probe offset details. 

[probe]
pin: ^!PA7
x_offset: -46  # Your probe is 46mm left of the nozzle
y_offset: -40.7  # Your probe is 40.7mm in front of the nozzle
#z_offset: 0.0  # You will calibrate this later with PROBE_CALIBRATE