A: An S-Corp has some limitations here (such as no more than 100 share holders and only one class of stock). Depending on the control that you seek to retain in your business, you may want to transition to a full C-Corp, restructure preferred (voting) shares from equity shares, and manage your business governance (Board of Directors, Officers, Resolutions, etc.) in a way big investors will find compelling.
A: These are great questions, and are going to be very specific to your corporation and how you want to run things. Generally, you can structure things however you want, but working with an Attorney on your bylaws will ensure an objective outsider is thinking through how conflicts can be resolved before they impact day-to-day business operations.
A: The federal ESIGN Act, passed in 2000, gives full force and effect to digital signatures with the same weight as "wet" signatures.
However, you should discuss this with an Attorney for your specific agreement if you are concerned. An Attorney can research your specific industry, regulations, and state statutes that may impact digital signatures or have specific requirements around digital signatures that are different from other documents.