obtaining Smart Visa is 75K for first year the next year is 10K for renewal,
Your government compliance such as withholding tax is excluded and its case to case basis depends on the type of smart visa you have. If you want to know the full information better inquire to them directly.
Try EOR its the right visa for you since you have company overseas, I can recommend you to this company who do EOR services. They help me to obtain my Smart Visa.