streetwear

I am looking to create casual yet luxury streetwear. I would like to recreate something quite similar to the brands Soleboy Apparel/Trapstar London/Palm Angels etc. My brand name is LASTNITE and I will be based in the UK.
Style Description - casual yet luxury streetwear, comfy stretchy fit.
I am looking to start with just two different ideas. The first being a ribbed cropped top and leggings matching fit. The second being a cropped velour tracksuit with a track jacket and shorts.
Fabric Details - Polyester/Elastane stretch velour/Cotton
Colour - I will start with only two for now i think, so Black and Dark Grey
Prints or solids or other info - I would like to have the brand name (LASTNITE) embroidered on each of the tops and bottoms - I can send the logo design if you would like this now.
On the velour tracksuit - I would like the track jacket to to have a zip and the shorts to have a drawstring in the wasitband. I would also like a white strip going down the sides of the jacket & shorts - similar to how adidas tracksuits are designed.
Sizes - I would like to start by having XS-25 S-50 M-25 L-25, for each piece and in each colour if this is possible. Please let me know if the minimum order would require more.
Im not very sure how much this would normally cost as this is the first time I am doing something like this. If you could please give me an estimate cost of how much this would all cost that’d be great.