Foreign citizen from Hong Kong investing in the US
The best way to open a company that would hold an investment property in Maryland is to form a Maryland LLC. It doesn't matter that you are a foreigner - it is possible to form the company and to obtain an EIN for it, without any documents or your physical presence in the US.
The only reason why you might want (need) to come to the US is if you want to open a bank account in the US for this LLC. However, if you choose to do the banking in Hong Kong then you would need to order a certified copy of Articles of Organization with Apostille and use it in Hong Kong to open the bank account for this US LLC.