I work as a mechanical engineer for a consulting firm in the Baltimore area, but my passion has always been for running.

Domestic hot water, and; Electricity adequate for lighting and any mechanical equipment within the home.

The property had an existing 100k mechanics lien that was guaranteed to be wiped once we took possession.

I would first explore ways in which you can maximize existing space before going that route - reconfigure closets, for example, or stacking landlocked features - closets/bathrooms/mechanical/etc. 

I am involved in construction sales & operations on a daily basis and have a high level of understanding on how the business operates, specifically the mechanical aspect (my specialty).

that's great to hear you have an interest in real estate - I got a degree in Mechanical Engineering - i was really good in design / math - but just hated the type of work..

Or the house need a new round of roof, mechanics, electric?

Just wanted to add that in order to get the enhanced title insurance, the one that lets you transfer into a trust and carries over to beneficiaries of trust and also protects you from post-policy mechanics' liens and clouds on title, you need a survey.  

I am a contractor so I got started with a mechanics lien and well the cash flow was nice.

I don't know the arragement you have with your family friend, but if you don't bring cash to the table, it is going to take A LOT of successful flips to keep you housed, fed, and clothed, unless your friend wants to run a charity.I have a full-time mechanical engineering job in a chemical plant.