Technically, this would still be a rental but I am curious if they have the ability to restrict how or what method I use to sell my home? 

There are a number of methods.

For purposes of having a commercial space, for business credit, applications/requirements from many companies and to keep our incorporation in the state of Oregon, we are currently leaning toward continuing to rent the cheapest office unit month-to-month as our Principal Place of Business just to meet the requirements of state incorporation/other companies.I'm certain that we are not the only virtual business to face this dilemma... has anyone found a solution to this.. perhaps a method or another state that permits virtual businesses without a physical presence to be incorporated in their state?

Obviously, you should have had a mtg and a better working method.

You can also drive or walk a neighborhood and look for poorly maintained homes and find the owner that way (this method heavily depends on your market)  it probably wouldn't work to well in places like CA

I'm looking into the best method for me to keep the rental property income and expenses separate from my personal accounts to make my life easier at tax time.

We previously decided to try the sell by owner method and elected a buyer in November 2017.

I am wanting to build a rental portfolio of single family houses with the BRRRR method. 

This method will almost always give you positive cash flow but you will end up being a little closer in proximity to your tenants which can be a downside for some people.

What investing methods (buy & hold, turn-key, BRRR, flipping, etc)?