Honestly, I think this build will be a great respresentation of the a1/1, and will give Mr Martin many happy an hour with, which is after all why we do this It represents a way of doing things cheaper, but I wouldnt call it the best. Frankly there isn't a best way to make models as they all vary so much and what is available to the modeller changes all the time as well as their own circumstances! Every method has it's niche, and with the amount of varied people, I think it's great that everyone write's up their way of doing things, theres something for everyone! I think it would be foolish for anyone to criticise a way of doing something over the other or to discourage any singular way.
My apologies chap I misread your meaning, the pitfalls of the internet! lol. I know what you mean though, sometimes it's nice to know where your money is going especially with all of life's responsibilities, none of which come free! I think the cost thing would be an interesting experiment for somebody to do, recording all the specific and even smallest of costs, laying it up as a sort of bill and publishing it to give people an idea of whats involved etc, unless of course somebody has already done that in which case I apologise.
Again, tons of reasons why one would have one done, entirely the modeller's perogative and rightfully so! Definatly worth doing.