4 HO trains on a 1 50 X 1 50 cm small layout

4 HO trains on a 1 50 X 1 50 cm small layout.
1st line. Piko expert 119 DR DCC HO with freight wagons from Roco, Marklin, Piko, Lima
2nd line. Piko Hobby G7.1 PKP DCC HO with 3axles Roco Hellenic coaches
3rd line. Piko expert 118 DR with Lima freight wagons
4rth line. Roco Koff 3 (private) with 3 Lima car tranporters (stationary)