Bring that back to the seller and say you need a discount for the work outlined to bring the property to market value. 

Multi-family is not out of the question, but will need to learn more.I am a CPA and work in corporate finance for a large public company and understand and am attracted to the basic economics of REI.Re-locating to Houston in Aug and will be starting business thereFrom reading biggerpockets posts, clear that I need to build a strong network and attend as many networking events as possible to build deal flow/pipeline, find a mentor, meet brokers, develop relationships with contractors etcInitial areas of focusResearch and outline investment strategyIdentify investment criteriaIdentify and attend networking eventsMake contact with agents and generate opportunitiesIdentify potential mentorsCreate business cardsI'd welcome any general reaction or feedback from this community on the above plan, and, in particular, any thoughts on where I should initially invest my time and resources. 

Is there a website or a doc that outlines each and every step to do that ?

A basic outline which may need to be changed due to the state, county,...

Well in the situation you have outlined, the most important relationship you can build is with the tenants.

I've been a buy and hold investor for several years and, knock on wood, I've never experienced anything like you outlined.

Then this lien shows up and the parcel outline was the street in front of about 4 homes including the Chicago band member.

Hi Rosanna has a very good outline above.

@Jacob JudahI personally recommend not doing this for several different reasons, many of which are outlined in this thread HERE.However, I definitely recommend house hacking with a duplex - just live in the other unit! 

It's a breach of contract as there is a failure to perform.I would give them one last chance to perform (with the threat that you are putting it in the hands of your lawyer) and then take legal action if you feel that strongly.I spoke to the closing attorney and asked her to send a letter outlining the breach of contract with intention to take legal action if they fail to close.