Most trainers do not and will not work like that.
They train. They have a program in place that your horse will have to go along with.
When you say you are flexible? Are you expecting them to come out there to your place?
Or are you wanting horse to be in training at theirs?
What exactly are you wanting them to accomplish, and where is horse, and you for that matter, at now? Know nothing, half trained, or ???
And not sure why they would need to look at your horse, unless you are going into a discipline that horse needs to be suited for?
If you are getting this response from majority of the people you are calling? I would wonder if you aren't off track in what you expect, or they are picking up that you are just going to be too much trouble to deal with.
Don't know for sure what is going on, or what you want done, but just seems hinky to me.
Horses make me a better person.