Thank you Alexis/Francisco/Jesper for your replies,
First of all I'd like to explain that I'm aware of the differences between CGI and photography, actually my background is more towards photography than visualisation but in these years I only worked professionaly on CGI and never thought to offer such service to clients.
What I miss for sure is how to handle a task from start to finish in architectural photography as it requires a different schedule, contract, copyright agreements and technicalities that are different from what I usally do for visuals.
Saying that, I don't know if marketing wise it works or not.
As told on previous posts could be a nice service for clients...they have to ask just to one person/studio for all the imagery they need for built/unbilt projects.
My worry is that clients could also be a bit confused on what you are offering and maybe they think that is better to hire one professional for visuals and another for photography. At the end is your work that speeks for you so a client should be able to understand if you can manage both but maybe the trend is to ask it to someone who does only one.
As regards gear I think that nowadays cameras are really good and with an investment on two TS lenses you should be able to offer good images, technically speaking.
@Jesper
I saw your website and I don't see a section related to architectural photography, do you offer this service occasionally when required or do you market it separately?