Botanical Wall Art Needed

I run an Etsy shop (Ochre & Line) selling digital-download botanical wall
art print sets. I need an illustrator to produce 50 coordinated sets of 3
prints each (150 individual designs total), all in one consistent house
style, built to exact print-production specs.

HOUSE STYLE (must match exactly — reference images attached)
Hand-painted botanical illustration in a vintage/editorial style. Every
leaf, stem, and petal has a fine, confident dark ink outline, filled with
watercolour/gouache-style colour with visible brush texture. Subtle paper
grain across the background. Full-bleed composition filling the entire
canvas edge to edge — no border, no frame, no die-cut or silhouette
shapes. No text, lettering, or signature marks anywhere on any print.
Portrait orientation.

PALETTE (strict across all 50 sets — do not deviate)
Terracotta #C1653C · Rust red #A8461C · Dusty rose #D9A6A0 · Olive green
#6B7048 · Sage green #9CA77D · Warm cream background #F4EEE3. No blues,
no purples, no bright saturated colours outside this list.

SCOPE
50 sets, each containing 3 coordinated prints on a distinct subject/theme
so the shop's catalogue doesn't repeat itself. I already have themes
planned for the first 10 sets (e.g. fresh wildflowers, dried grasses and
seed heads, leafy foliage, bold native blooms, garden roses and herbs,
citrus branch, autumn berries, minimalist single-stem, potted succulents,
pressed botanical/herbarium) — happy to share this list, and I'd want
your input proposing themes 11-50 following the same logic: each set
visually distinct from the others, still on-brand and on-palette.

TECHNICAL SPECS (per print, all 150 files)
Minimum native resolution 1122x1402px, high enough to hold up
when scaled to true 300 DPI at these sizes: A5, A4, A3, 5x7", 8x10",
11x14", 16x20". Reference pixel dimensions at 300 DPI:
A5 1748x2481 · 5x7 1500x2100 · 8x10 2400x3000 · A4 2481x3508 ·
11x14 3300x4200 · A3 3508x4961 · 16x20 4800x6000

MOCKUPS
For each set: 5 additional listing photos showing all 3 prints together,
framed, in photorealistic room settings (2 different rooms + 1 clean
product/flat-lay shot). No text on any mockup.

DELIVERY FORMAT (per set)
One ZIP per set, structured as:
Set_XX/01_Print_Files/ (3 master PNGs, each its own file — not crops
from a combined sheet) and Set_XX/02_Etsy_Mockups/ (3 mockup PNGs).

WHAT TO AVOID
- Delivering prints as crops from a combined/composite image — each must
be its own independently created master file
- Any colour outside the specified palette
- Any text, watermark, or signature on prints or mockups
- Flat vector/clipart style — this must read as genuine hand-painted
illustration, not a simple graphic

TO APPLY
Please share a portfolio sample in this exact style if you have one, or
a quick test piece. Given the scope (50 sets), I'd like to start with a
small paid trial of 2-3 sets before committing to the full run, so we can
confirm style fit and workflow before scaling up.