If nothing else, I learned how to do just about everything as far as renovations go, and now can walk in to any property in the area and have a general idea of what I am getting myself in to and the costs of the rehab.A few takeaways from this project:1. 

Hi @Matthieu Benoot,If your lease allows fix the screen and add it to the rent for that month.

In addition, as market rates rise newer loans are closer to the target return thus reducing a need to discount to achieve the desired results which can translate into perhaps less risky assets.  

In addition to studying here on BP you should attend local REI meetings in your area to network with others and build relationships.

Cash buyers are tending to get more closings because they are offering quick closings and the seller's like that.Learn how to say "no" and walk away from a deal that does not meet your requirements.  

In addition, the federal government at the time would even give away land for free.  

2) If seller's agent was blowing smoke then walk.3) Don't waste time and emotional energy on it in addition to losing a few bucks.4) Focus on the next deal instead of the misery of this one

In addition, even if they did use meth they may not have done it in the property. 

In addition, for the ones that do make it to the market, owner-occupants face stiff competition from the plethora of investors in the NYC area. 

That way, if anything major is discovered, you'll have time to assess the situation and obtain additional inspections from other specialists as necessary.