Hi there, I have read your requirements, and I'm glad that I have rich experience with Unity3D and C# language.
I am a professional game developer with 4+ years of experience. I have developed games for Android and iOS. I have experience using and creating new assets. I developed different plugins with custom inspector. I can make you your custom inspector with optimised code. I will be happy to work with you. Please contact so we can discuss it further.
I would love to show you my previous work. Feel free to ask any questions, I'll be happy to assist you. Thank you
Best regards,
Zohair Kharal