Now is time to assess why it over-flowed so it can be properly fixed and get some estimates on repairs.

I have a feeling the external vent pipe is not properly installed (perhaps too curvy or pinched) regardless I want to see a professional who can help with lint cleaning as well as assess if the external vent pipe is properly installed.Whom should I reach out?

Don't just take last years taxes, you need to look at what the property is assessed for and then adjust based on the price you are going to pay. 

Then you can use this to assess any potential increase in taxes when you try and rehab the property, etc.

Another pro, when the tenants move out they will have less of an argument when you are assessing damage and disbursing the security deposit accordingly.

Even if you could buy a home at a steal right now, most buyers would need to physically go and see the property, bring a home inspector to assess the property, and—assuming you get an accepted offer and arrive at the virtual closing table—you will need to hire contractors to work on the property, or find a tenant willing to move in this crisis.

Here's what I'd offer up as some tips to find and vet your trade contractors:Take advantage of your network first - ask for references so you can start building a list of contractors to assess. 

This seems to be in much better shape, but again, its not stellar.First impression: By my very less than professional assessment, I believe the house needs light to medium renovation to make it as good as new or better: Paint, updated fixtures, new counters, carpets and lights.

The verbiage used was "The names given being those of owners or occupants as the same appear on the assessment rolls for the levy year 2017". 

You also have a long term risk of special assessments if the money collected isn't enough to cover major projects like roofs and parking lots or the condo association isn't well managed.