The transmission line is a bit bitter, but it costs a lot of money.

The distribution network is often outside, and it is often stationed in one place for several months at a time, and the money is not too much.

The second substation needs less business trips, but it needs solid power knowledge. It often takes a long time to get started, and the money is less every time. Suitable for girls who are inconvenient (even men, they have to do it twice), but painting is dazzling.

It is recommended to make a substation, and money is the main major.

Recommendation: primary substation > transmission line > secondary substation > distribution network.