As a reseller, it was tough even breaking even with providers who did not understand the business of web hosting. Some asked me to switch to ResellerClubs reseller hosting plans. Since then the journey began and I am a moderately successful reseller now with some good business.
For most resellers performance of the service provider, on-time support duty, the ability to resolve issues, and adding resources as and when required is a must. My success was based dont these parameters and after discussing with ResellerClubs account managers, they understood my difficulty and gave me a package accordingly. That is where they gained my trust, by actually solving my part of the problem and giving service like that.
I urge you that draw a good model for your business first and then go about it.It will be much easier that way.