@Andre Wilson, I'm glad you took the time to post about this deal and I hope you take the time to evaluate the feedback.
First thing that comes to mind is that the owner that has tax liens could likely have other liens.
Second thought is that owner that has tax liens likely hasn't taken care of the property. If all of these numbers were actually real, how many water heater/hvac/appliance/fixtures/electrical/etc. would need to go wrong before you had no cash flow? Landlord is probably a slum lord, I know you have margins to rehab but make sure you conservatively estimate rehab costs after your inspection.
Third thought, don't spend a dime on inspection or anything else until you get a clear report from the title company. When I was BRRRRing I was under contract at least 6 times with properties that had liens or title issues. It just comes with the territory. Sometimes distressed properties come with distressed owners. Everything from the actual owner being dead to a lady not being able to find her husband. No explanation, she just couldn't find him.
Keep us posted.