Newbie needs recommendation on contractor Westchester NY

[Mario Masseroli]

Hello,

This is my first post on the forum. I have been researching quite a lot and feel ready to jump into action. I have been actively looking for details and have found a candidate house. Now here is my biggest issue. I have no experience in dealing with contractors and since this is my first deal I am lucking reference in term of cost for different jobs. 
the house I am considering is in upper Westchester county in NY. I could get the house for 200k, and comparables are on the upper 400k. The house needs quite some work. Nothing structure wise, but need new roof, new siding some framing on the basement for adding new room, wiring on the basement. New furnace, new kitchen and update 2 small bathrooms. 
it is a 3 bedroom, 2 bath with 1100sqft total. I could add 400 sq ft by finishing the basement and transform to 4 bed. I starting requesting quote from contractors. I met 3 and got quote from only one, but looks crazy expensive to me.  225K !!!

I know Westchester is an expensive area but seems really extreme to me. 

Does anyone has experience in flipping around here and can help with reference pricing for different jobs?

Also I would really appreciate if someone could recommend contractors !1

thank you very much for you help