I also think you could be better having someone come to you. This means that the horse is worked within the environment and terrain you have, and that you can be part of things and learn from watching etc.
My instructor (who is mobile and comes to the horse) is riding Arns for me as part of my lessons. She charges £40 an hour and is worth every penny.
However, I do think that you have to realistically assess whether your horse has the basic nature and temperament to make the two of you a good match.
Have just read your other thread and I really feel for you.
Only you can make a decision on how to proceed but there is no shame in admitting that a horse is just not the one for you, nor you the human for him.
In fact it can sometimes be the very best thing you can do all round.
As long as you take every care to find him a good and more suitable home then you have still improved his life for him, which is a lot more than many people do.
Doesn't mean there isn't a horse out there who would be your perfect family freind.
Good Luck whatever you decide