I found my contractor is registered as a foreign profit corporation in North Carolina.

Other than setting up a domestic and foreign LLC due to properties being in different states, transferring the deeds, and opening business bank accounts (and funding), what else needs to be done?

From this site, it looks small LLC does not need to file sate tax:https://www.dos.pa.gov/BusinessCharities/Business/Resources/Pages/Foreign-Limited-Liability-Partnership.aspx"Under the U.S.

The lawyer will tell you, you need to have an LLC in the state you're operating in or register the WY as a foreign one.

For 2023 TR, IRS held 10% of the selling price because I am a foreigner.

There are plenty of American and other foreigners who buy in Mexico and many, seemingly like you, do it for lifestyle first.

You can hire foreign VA to cold call, you just need to find the right one with RE experience and speaks well, the rest you can teach them.

If you look at cities that are growing, such as Jacksonville, Nashville, Tampa, Dallas, and our favourite - Phoenix you will find great deals in C/B areas that have great cashflow and will also appreciate.Expect to pay more than 39k (also remember to include the exchange of 30%) but a lot less than $300k like that property in Peterborough you mentioned.

I have done some research on this matter found that "Foreign National Mortgages" do exist for foreign visitors wanting to buy property in the USA. 

They have a middle class whereby there is a mass of locals that can buy the same properties that the foreigners buy.