I can provide you with quantities of (400 - 700 property leads) which will be sent to you in an excel file.For each lead, you will get the owner’s name, mailing address, vacant home property address and the owner’s phone number.

I purchased the house as a TWO family, as was stated in the contract, but now finding out that I can't get a Letter of No Objection (LNO) for a TWO family. 

If I was looking to live in a particular place and looking to invest in multifamily, I would first begin with my goals, objectives, criteria and budget (in that order).

Depending on your goals, objectives and criteria, you should either start direct marketing or (save yourself the hassle) and start developing relationships with commercial brokers and property managers.

The boilerplate answer is that it depends on your investable capital, ability/willingness to take risks, unique circumstances, investment horizon, legal concerns and liquidity (among a few factors).In your particular case (assuming you're under 35), it boils down to ability/willingness to take risks and investment objectives (closely tied with education and investment expectations).

While we are objectively high earners, this area has such a high cost of living, so we are not going to become wealthy any time soon on our double W-2 income.

A little more info: I have around 10.000 dollars cash saved up and available for this objective and looking for ways to get a loan for acquisitions in the US.

If you are new to real estate like me, what are your objectives?

The objective of your rental strategy it sounds like is cashflow (you are specifically citing multifamily).

Close on it with either hard money or with a capital partner who understands the objective.