Investors & landlords

@Carl  I have a related question for my rental property. I am a single mom working full time. On the side I have rented out my condo (I’m not living there) and I just created a DBA and got an EIN number. I was told creating DBA will let me take deductions like car, computer, gas, maintenance of property etc. I was wondering if I need a business account or get rent paid to DBA for deductions and to look like a legit business? Also should I put this DBA business name in my living trust? Or put my rental condo in the DBA name? Sorry newbie at this - trying to figure best way. Thanks in advance for your help.