New York is hard to evict people and you'll end up spending more time and money doing it yourself.

When evaluating a property management company, it's important to look beyond just the management fee and consider the full scope of services and costs involved.For example, at our company, we charge a 10% monthly management fee, a $250 lease renewal fee (unless it’s a takeover tenant, which requires additional effort to establish a strong relationship - because usually people are changing pm companies for a reason), and the first month’s rent as a leasing fee.

Lots of people who have trailers don't own the property they are on and sell them.As for the owner of the land expecting tenants to do repairs-there shouldn't be many repairs required to the land, just the trailer that is on it (which your grandmother owns and should be responsible for maintaining). 

The entire focus is on new people because they spend on more.4.

It is big but I am hearing now people want dishwashers and w/d in units.

That would bypass many city/state regulations that force landlords to rent to people here illegally. 

Each grouping had a common room (perhaps it was shared by multiple groupings ... this was a detail I missed) with a nurses/aid workers office.Central to the two sides of the complex were common facilities such as a dining hall, gym {perhaps a pool ... another detail I missed}, theatre &  games room.With one of the fastest growing groups in our society being single people, we are examining a related idea of a  complex / building providing a modest-sized 1-bdroom "apartment" with more semi-private and common amenities.When I read the title to your thread, I thought it was a project proposing to mix students and seniors into a single complex ... and came in thinking, this ought to be interesting :-) 

I'm hoping things move a little more quickly once things go vertical as I heard getting slab poured is the longest wait but I'm assuming there is a labor/material shortage in general in the area so wasn't sure of people's timelines once slab has been poured?

@Michael Daniel Probably better to post your numbers here and perhaps people can run them on their end and give you suggestions.

I'm doing this exact thing right now- I've been pleasantly surprised by how many people in my network have resources, cash and interest in something like this.