I'd be sure to include a 15-20% "oh crud" in your rehab estimates since you've never done this before as far as I know. 

I am new to the US real estate market and I want to invest in a 4plex within 3-6 months for buy and hold as a starting point.Tentatively:Area of interest: Columbus/Cincinnati Ohio Any recommendation to me relating to:(1) Experienced realtor; and (2) Lender with mortgage program to foreign investor.Thank you very much!!!

For example to become a licensed broker where I operate (Ohio) you need to go through government background checks, have worked in real estate as a sales agent under another broker for at least 2 years, have a college degree, have a physical store front with office hours, have done at least 40 transactions and much more that I can't think of off the top of my head right now.

@Jeshua Patrick Oh it's a learning experience indeed.

Hello BP! My name is Landon and I've been a member of BiggerPockets for a while now and love reading the different forums and gaining valuable information that everyone is so willing to share to help others.  I'm curr...

As far as future rentals: I haven't narrowed it down a ton but as @Zeke Liston kindly gave me a heads up on in this thread, Columbus OH is an up-and-coming market that looks to be in the price range I'd be looking for.  

See Andy's post above.And Tax liens sales in PA are a completely different animal than they are in OH. 

@Michael Hamby oh, got ya.  

I do paving work and Here in mid Ohio it kinda varies by the condition of your current base.

You can find them on Facebook or Meetup.com at ORIC (Ohio River Investment Club).