What would you say were the top 3~4 challenges you had to deal with in stabilizing that property?

Should we challenge it?

Finding a contractor to move in mid job has been a challenge and so far I have lost about 3 weeks in the rehab process. 

I'm not trying to minimize your efforts but to alert you to the challenges of marketing in most every community where there are so many buyers with money chasing so few opportunities at the the moment.

Basically you should be prepared to defend the statement if anything.

Go to school, get good grades, go to college, get a good job when you graduate, save for retirement, work 40 years for a company, you'll be okay.You're challenging that. 

I have a good grasp on what I can get siding, windows, trim, interior/exterior doors, decks, guttering roofing, flooring, landscaping and concrete done for and who to use/where to source materials, along with electrician/plumbing -- lacking site prep, foundation/framing/roof trusses cost -- I could get the cost of the rough in from a buddy who runs a plumbing co.My challenges are A - not being able to be there all day to run things, and B - still missing some of the key contractor connections.  

My big challenge I see in front of me is breaking into and building a network of local investors. 

I challenged folks to show me that over 5 years period (I am sure those returns are a lot less).

If it's a house just in the town, where the kids have to get a parking permit to keep their car on campus- it may be somewhat challenging to keep all the rooms rented.