Selling an option contract out of state...foreign entity?

[Tobias Schnellbaecher]

Hello to all, 

I plan to form a corporation for my future real estate investing business. 

The main strategy at first will be to sell real estate option contracts and consulting services.  So no buying and holding with local operation and physical property.

Let's pretend I form this corporation in Wyoming. Would I have to register as a foreign entity, should I sell an option contract of a house in Florida? 

From what I understood according to this article here https://smallbiztrends.com/2014/03/register-busine... foreign registration wouldn't apply in my case, since I wouldn't have a physical address or employees or a warehouse or a physical property I buy and hold in that state. 

Do I understand this correctly?

Thank's already for your help!

Cheers

Tobias