@Ricardo Cristobal You're right, southern California is an expensive market.

I looked briefly at their website and they are expensive (from a landlords perspective) compared to the alternatives.

We use Buildium for our PM software to track income/expenses for flip projects, manage tenant info, track bills/invoices, and to track the bank accounts associated with our businesses and the PM business.

Your numbers look right to me, assuming you have P&I built into the monthly expenses already, which I'm assuming you do. 

However, my partner paid $20k more in selling expenses than I did.

I think you're right, they may see it going toward foreclosure and the ridiculous time and expense in NY is not worth it and may not even be covered by the equity.

You actually can use the "class" feature to assign expenses to each property- that way you won't need to get a new subscription for each property.That is- as long as they are all going to the same return.

The items in blue are calculated based on the other data.I took some sorta educated guesses for things like yearly increases in taxes, rent, expenses, insurance, and appreciation.

Pros,  MLS access, networking, save on commissions,Cons  Expensive (around 2.5K for me in Chattanooga), slightly less freedom in deal making because of required disclosures and prohibition on talking to represented parties.  

I'd worry about the most expensive things in an inspection/walk-though, foundation, roof, windows, HVAC, electrical system and plumbing.