3) what’s the plan if they spend that $3,500 and a month later another $2,000 bill comes up?

She knows the plan and she is in control.  

After that I plan to quit my job and become a full time investor flipping properties.

Is he a GC and they fall out of his truck bed, is he doing work projects in the dwy, there must be something specific...So first thing is if the other tenant is causing this, then they should be paying for any repairs and tire replacements.

Include specific information about the location, amenities, parking, and building. 2.

I plan to save the rental income for reserves, screen tenants properly, buy in C+ to B class properties. 

The numbers and business plan more than adequately support the project numbers (can share privately). 

Im located in Phx,Az and its common here to still see empty dirt land in prime areas of city, as an example, my father who knows next to nothing about real estate purchased a 7k sqft gated dirt land  in the city 3yrs ago for $35k cash, was planning to invest in it but it was too much hassle for him so recently he sold it for $140k .What's a good way to find good deals on empty dirt land  in the city or close by, does mls offer this search option.

I was only in Brooklyn for 4 years as a tenant, so I can't comment about investing in NYC specifically. 

However, if you need fast access to funds or have difficulty qualifying for a HELOC, a hard money loan could be a viable alternative, especially if you have a clear plan to refinance quickly.