The following are ways to get service of experts cheaply:
A friend helps a friend: Look around your network - friends, mentor, family members, school met, colleague at work and your loyal customers. Because of close relationship and interdependence they have with you, they may perform their services are cheaper price or some cases at no cost to you at all.
Strategic partnership: You may acquire service of a business or an individual whom you also offer certain services or products. It follows the basic principle of love - love someone first, and he or she will love you back. For instance, you have an electric engineering company, your client is a tax consultant. You can offer tips on how to save its electric costs, offer other services for free, in return for the tax consultant to post adverts of the company on its website or office, and also the tax consultant being treated as official tax/business consultant for that electric engineering company business.
Provide Internship opportunities: Instead of hiring a large number of experts for a specific field, you may hire one or few experts for that particular field, and then provide opportunities for internship for the rest of the vacancies. In your selection of internship, the available experts should be involved to advice you on the best choice you can have from the applicants.
Compare prices: Just like you do window shopping for groceries, clothes and furniture, you can compare prices and quality of different experts for your organization. You can use internet too, to find best possible price for you.