How to install ground source heat pump with horizontal installation way?

1. I do not have a large garden, can I install a geothermal heat pump with horizontal installation way?
Sure, the calculation normally is 1 sqm for 1 m pipe, and normal house is about 200-400 square meters.

2. My installation place has big height difference, can I install geothermal heat pump with horizontal installation way?
It is possible to install ground source heat pump on a altitude, then circulate heating water in a closed loop.

3. How deep need to dig with horizontal installation way?
Normally need to dig a pit next to the house which want heating, then plow down depth of 80-100 cm for placing plastic tube, the tube length designed by house energy require.

4. Are there any risks with geothermal horizontal installation way?
The biggest risk with this is installation is plowing, as pipes in the ground can be damaged. So when plowing need to be careful.