I want to get quotes and was just curious if there was a basic rule of thumb.

The basic information is below and comes from owner-supplied rent roll and 2017 figures:Listed Price: $339,000Gross Rent: $47,520 ($495/month per unit)Taxes: $1,506Trash: $666Utilities: $6,406Cable: $1,982Maintenance/Repair: $4,673Insurance was not listed in the numbers given, so I estimated insurance to be around $1,617 based on 0.003% of property value plus $75 per door.

Basically i want to know what works best when looking for properties ?

You basically have a mini apartment. 

Some financials about me;230 debtAbout 65k a year10k saved upno kids and singleMy credit score was a 770~ last time I checkedI live in my basement with my parents so paying no rent at all(I don’t mind living with them for some more years if that’s the best move)The advise I need is basically figuring out what to do now, In Long Island I feel there are rarely any 2 family(duplexes) out here and obviously don’t really want to pay market value as well.

@Joy VanAssche hello Joy I'm Amanda and I'm new to investing and i found a deal in Wenatchee wa and I need some help with running basic rehab numbers would you by chance be willing to help me?

Basically, I want to know how to best ensure that the mortgage (and insurance) payments are made in timely manner and that the seller doesn't use these checks for some other purpose. 

In saying that, getting in to a deal without the proper education is risky... i suggest you start reading books and listen to podcasts about Multifamily investing so at least you have some basic ideas.

The ULI membership itself is steep but the classes aren't cheap either.I'm located in Boston and these two events are coming up:https://americas.uli.org/event/basic-real-estate-d...https://fall.uli.org/I'm trying to get my foot in the door of a development company so I can learn the ropes of some small/medium sized developments and adaptive reuse projects with the end goal of taking on my own projects down the road. 

Basically she is incredibly difficult and we have resorted to dealing with her mostly through letters.