Hi,
What is your idea of Difficult and Costly?
Most host providers I have found have been extremely reasonably priced and very easy to put agoracart on.
If a provider cannot support agoracart, I would be seriously wondering what applications they can support.
You will find a number of providers who offer hosting at $5 per month and who will easily get you started with agoracart, there are some providers on here for a start.
If the domain is yours you have the right to point it at which ever host you wish.
Agoracart can be an instant setup, but if you want more bespoke items on it, there is a slight learning curve and if you have the added problems of tweeking things in background just so that your hosts configuration can run it then it is probably going to cost you a lot more than finding a new host.
I do not know Go Daddy as a host, so I can not answer your question as to which agoracart is best to run on it. If you go for anything lower than v5 then you are loosing tons of functionality.
Someone will no doubt be posting to say which is best for GoDaddy, but they will probably say the same as me too.
Hope that helps some.
Glen.
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glen.m.darby@virgin.net