I may be reading too much into your question, but it sounds like your existing customer base is too small to support your development activities. Have you thou

I may be reading too much into your question, but it sounds like your existing customer base is too small to support your development activities. Have you thought about seeking out a trade association and selling them the rights for their members to use your software? You may be able to grow your customer base while reducing your transaction costs. My field of expertise is software pricing, so feel free to contact me!