42 is the whole full rack, so the most you would pay for 10 would be this, but likely you would then want to just add 2 more avalons to use up the space.

Colocation package - Full rack up to 7 KW

Rack in 3 T enviroment, full rack, up to 7 KW
4KW power included

Physical Ethernet port 1 Gb RJ45

/29 5 IP addresses

2TB of internet traffic included

Physical Ethernet port 1 Gb RJ45

Ethernet management port for servers 1

1 hour remote hands included per month

Price: 990 EUR per month