If your calculations on expenses or vacancy are even a couple of percentage points off you are putting yourself in a position where you may end up cash flow negative.

The sample property you gave is negative cash flow once, or maybe cash flow neutral under absolute best case scenario, once you add in realistic PM and CapEx fees.

W/ regards to crime statistics you can use Trulia crime map to review if a block is hot or not.  

July stats Single-family home sales rose for the tenth straight month, up 5.0 percent year-over-year with 7,440 units sold;On a year-to-date basis, single-family home sales remain 6.8 percent ahead of the 2016 volume;Total property sales increased 4.5 percent with 8,821 units sold;Total dollar volume climbed 7.5 percent to $2.5 billion;The single-family home median price remained statistically unchanged at $230,000;The single-family home average price increased 2.4 percent to $299,131;Single-family homes months of inventory grew to a 4.5-months supply, the highest level since September 2012;Townhome/condominium sales fell 9.0 percent, with the average price up 1.8 percent to $201,148 and the median price down 6.2 percent to $150,000;Leases of single-family homes jumped 15.6 percent with average rent down 3.2 percent to $1,815;Volume of townhome/condominium leases rose 12.3 percent with average rent down 5.1 percent to $1,546.

You're allowed to ask for a statement from their physician and you are allowed to evict if you see negative behaviour from the dog.

When a investor must park cash to "create" cash flow they have purchased a property that has, and always will have, negative cash flow.

If there is a market downturn in the short term, whoever buys there will be in negative equity.But in the long term (10 years from now), they will be worth more.In summary, Waterfront area in Weehawken is a speculative market, it is not for investment in my opinion.You can make huge return in the future or find yourself in hot water and not being able to sell when comes the decision to do so.But again it is a great to place to live in.Hope it helps.

Those go for 4 to 5 caps and usually foreign buyers purchase all cash as they want to get money out of their country and only get there maybe 1 to 2 percent to a negative return.If you are buying a Mcdonald's then it is not a vacant building.You would have to tell me your situation to expand further.

Do you think being an RE agent has benefits or negatives?

A common mistake most first time househackers make is assuming a deal is bad just because the cashflow is negative... you're still building equity into an appreciating asset, that your tenants are helping you pay for :)