Below is a collection of helpful documents, including budgeting tools, guides on writing a business plan, and more. Each good or service the City purchases has a competitive solicitation method that describes to vendors how their bid or proposal will be evaluated and awarded.Call us at (210) 335-2478 or schedule an appointment. HUB Certification requires general information about your business and supporting documentation to substantiate business structure and HUB eligibility. Buying a business in Texas? To register for the Centralized Master Bidders List (CMBL) to be a state vendor, you need to set up your eSystems user account. A business purchase agreement is a legal contract specifying terms for buying or selling a business, including conditions and obligations.