You need to apply for a regular visitor visa, not a business visa. A business visa is one where you are invited by a business already established in host country.
Here are the additional requirements for a business visa to Poland (from the Polish embassy in Kuwait, but the requirements are the same no matter where you apply from as they are for the Schengen visa scheme):
Business visa – additional documents
- Invitation from inviting person or institution, stating the purpose and conditions of visit (period of stay, who covers expenses
etc.), on a head letter paper, signed by an authorized person;
Invitation letter from company/authority in Poland/Schengen Area with
full address, stating the purpose and duration of the business trip
Information on event/congress/trade fair, i.e. information about
organizer/host incl. full address in Poland/represented Schengen
country, duration of event and purpose of participation (e.g.
con-firmed congress participation, trade fair visitor’s ticket or
exhibitor’s ticket, confirmation proof of trade fair exhibitor) and/or
Information reflecting the existence of trade relations or relations
for work purposes stating de-tails of company in Poland/represented
Schengen country and Kuwait.
- Documents regarding applicant’s sufficient means of subsistence during intended stay, such as: letter from employer with employer’s
consent for travel; salary certificate; personal/business bank account
statements; proof of income generated by property; letter from sponsor
If you are unable to supply the above, your application may be rejected simply on the basis that you applied for a visa, but your documents do not support that visa type.
I would suggest applying for a normal tourist visa (there are no restrictions on purchasing goods or conducting interviews / hiring people on a tourist visa).