Brown can be tricky colour to match with vibrant colours as Brown is not a fun colour. Brown and its shade are for timeless classic designs. It only goes well with conservative colours like white, black,grey and glass. Couple of options below

Plywood is MUCH lighter than MDF so it’s a good choice for LARGE cabinets. I usually choose a cabinet grade plywood like Birch which has a nice, hard, smooth veneer on both sides. Birch Plywood is esssspensive! so if u wanna stick to ply only then Sanded Ply is the option.

hi for internals you can use marine ply or water proof ply branded or non branded. In terms of finishing materials we suggest not to use ply etc since its kitchen. you can go for glass which looks elegant and easily maintained. Thanks Bhakti Bhojwani Team Ornate

Sujithra, Everyone has their own costing formulas. Due to professional courtsey we wouldn't want to compare/comment on that. However, BWP ply and PVC sheets base cost is similar. Just changing carcass material the reduction in cost may not be substantial. Thanks, Nitin Cornerstone Designs Bangalore.