I've not had an in-person coach (I've been doing Ideal-to-Go) and have found it to be totally workable. If you are not getting the support you need from an in-person coach, this might be an option to consider. As for weigh-ins, I bought a fancy-pants scale (I think it was $70) and have been weighing myself. I measure inches by how loose my clothes are getting
I am so sorry about your missed weigh-in. There is expectation and a certain amount of excitement that accompanies that day. I imagine it must have been very dissappointing as well as frustrating to have been stood up. This is not something that a good motivator does. Good work with keeping on plan despite this experience!