Hello,
If you want to let the choice to you customer to choose between a shipping to their shipping adresse or directly come to your store to get their products, the solution will be to create 2 manual shipping method via "Hikashop->System->Shipping methods" :
- One for the shipping
- One for the "pick up at the store"
If you don't have a lot of "office" you can create one manual shipping method per office, else you'll have to develop a custom shipping plugin which will require development skills.