"We are missing a couple of key players who had to pull out for whatever reasons, but the final is a realistic opportunity for us," he said.
"Hopefully we get some good home support down there."
The under-15s are in a relatively tough pool with the Auckland invitational side, Central and defending champions Counties, who they play first up today at 10.45am.
"The best time to get Counties is first up, they are going to be strong," Peacham said. "But we are more concentrated on us rather than the others."
Rotorua's Hayze Perham will captain the Stallions under-15 side at Puketawhero Park this week.
Each team will play one match each day this week with the under-15 games lasting 25 minutes each way and the under-17 games 30 minutes each way.
Peacham said, on the back of a good showing this week, he hoped to see some of his players invited to the under-16 New Zealand performance camp next year.
The under-15s played a preseason match last weekend against the Northern Swords in Whangarei, winning 28-14.
The Wai-Coa-Bay Stallions under-17 side play their first match today against the South Island Scorpions at 10.15am on field three.