Solana NFT collection

Need an Solana expert to build me a nft collection mint dapp(frontend) and contract on Solana which will randomly mint a nft from the collection. The collection will have a set number of nfts, the price per mint will increase gradually per certain Milestones and the contract will include royalty tax.

I will only talk to people that already built a similar product on solana and can deliver this in a matter of few days.