Im wondering if anyone can point me in the right direction with regards to how I can apply, where I can get more information (the government of Canada websites are brutal to navigate) and what the requirements are and so on.

Yeah navigating family dynamics is tricky. 

Aarya,I will recommend you get help from a local experience multifamily investor and they can help you navigate the seller financing route.Goodluck

This property is in New Jersey where most judges side against landlords in court so we are hesitant to file for eviction for fear that they'll come down on us about it being an ESA.Has anybody else navigated this sort of thing before?

1) Utilizing personal experience from building my own home then helping family & friends navigate process of building their own homes to starting a development company.2) New Construction at a price that a first time home buyer can afford and raise a family3) Providing jobs and employment 4) Creating win-win situations5) Working with family How did you find this deal and how did you negotiate it?

Hire a professional: Consider hiring a real estate agent, a property manager, or a real estate attorney to help you navigate the buying process and manage your property.

It is on BiggerPockets under Events but that section of the site is pretty difficult to navigate.

It can vary block by block in many areas so make sure you have a good property manager or agent who can help you navigate the neighborhoods.

I've helped folks like you, many from the west coast navigate an out of state investment. 

I recommend you join the California Apartment Association so they can help you with forms and navigating the law: https://caanet.org/