Logo and corporate identity for a consulting company

I am self-employed advising companies in all things legal, finance and tax. I would require a logo that is used on correspondence, business cards, mail footer, invoices, ... Main values are discretion, quality, trust, respect, in-depth knowledge. Logo can be abstract or figurative. I will turn the old family farm into offices and meeting rooms. This may be a nice element to work with (just an idea - absolutely not necessary). Construction work (a LOT) still needs to be done, but I will definitely keep the building's volume, form and character (see picture attached). Again -absolutely not necessary to work with this but may be a nice gimmick.