Your question did not contain any addresses or a link to the properties that you are asking about. Are you asking about the homes in the City of Detroit? If you are, the answer is YES you can purchase homes in Detroit. If you are not a US citizen, you will have to create an LLC here in the states and have a bank account here. There are a few other things that you must do in order to purchase the homes. It is all fairly simple and can be done fairly quickly.
If you are serious, send me an email and I can send you a list of homes to view and set you up with an accountant to help you create the LLC.
My contact information is listed below.