While big data may seem hyped up to many real estate professionals, better data means being able to pinpoint prospects with highly targeted marketing, and give them more of what they want.

What approx level of expenses I may pay for all efforts during due diligence period if I have to delegate it all to professional contractors?

--I am simply an inexperienced newbie (with one bad experience as an accidental landlord under my belt) looking for insight on deal analysis techniques from more experienced professionals.  

When incorporating the help of a real estate professional (agent, lender, property manager etc.) consider the following rule of thumb.

To me it's not clear enough but I would like your professional opinion

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

BiggerPockets is filled with professionals and people who are passionate about this industry. 

I’m currently living in a duplex I own, but am looking to buy a single home using the 203k loan and was wondering if anyone knows any professionals I can use for this to happen; experienced real estate agents with 203k loans, loan officers, contractors?

It may sound a little like overkill, but for me overkill probably isn't possible given where I want my level of involvement to be in performing active field duties and tenant interfacing, which is ZERO.That is all very valuable to me as it allows me to focus on my professional work and securities investment which is what I prefer to do.

While it is possible to find a decent contractor through these sites, the professional, quality driven contractor will have a strong, local network of satisfied clients and fellow tradesmen to funnel work their way.I've found that many of the individuals relying on HomeAdvisor leads are doing so because their work doesn't speak for itself or their clients have not been telling everyone they know about how well their awesome new renovation turned out.