When I become truly skilled, efficient, and reliable in my developing and printing I may add those services to what I offer, but just maybe. That foray will depend purely on me being able to enjoy that work and a real business necessity. If I can get to the point of making a comfortable living in my current business model I'll probably just stick with it and save my developing and printing efforts for portrait and fine art work where I can limit the volume and maximize the profit/hour spent.
For now I build into the sale (and make a profit on) the cost of pro film and the processing costs at a high quality pro-film-lab to do my back end work to get high quality proofs for the client.
This is the end of my work as a photographer in a business sense for weddings. Past this I'm a merchant selling the services and products of others.
I will sell albums and prints, but I hire out for this and I make a merchants profit, instead of a creative's profit, to cover the work I do of organizing and selling those "commodities".
I'm happy to make those sales but many times just as happy not to because they are not the core product of my wedding business, my camera work is.
Yes, my business plan views the lab work and albums as commodities. High quality commodities, but commodities non-the-less. They are pre-priced by the labs, available to any pro, there are various labs/album companies that can do the work who competing with each other for that business, they are inexpensive (when compared to my time), and they are reliable and fast in the grand scheme of things.
This makes for what is viewed as a nice high-quality product for my market and for me. It allows me to get paid nicely for my creative work, have good quality control, to keep prices low, and to do other things like spend time selling more camera work.
This does pose a problem for people like you who do your own back-end work and who RIGHTFULLY expect to be paid creative wages for that work instead of commodity wages.
You have to be able to sell that extra value.
What I don't see here is the connection between the shoot and burn market and the market you are selling to.
Ferraris, Chevys, and Yugos do not compete with each other. These brands market to decidedly different clienteles. The Yugo buyer isn't even going to look seriously at a Ferrari and vice-versa.
There are very few buyers capable of or interested in buying 40 professionally printed 40 inch Ilfochomes to document a wedding.
The product may be truly stunning and of the highest quality but who could buy such a thing?