Other benefit on paying extra on one only  is that if/when interest rates drop then better to refinance one mortgage (with higher loan amount) to save cost over two refinances. 

The benefit though is that most people I've run into here in the investment scene are good people who are positive and see the benefit of working together.

A large benefit of M2M is flexibility and easy termination.

Would definitely recommend checking out The Host Co @Diana Mulvihill - I know a lot of hosts using Hospitable.com are using it and seeing the benefits.

In any case, I don't think I'd want to let anyone else get my VA benefit.

Benefits is that we know the area and know contractors in the area.

I’ve been researching subject tos and I just just wondering, does subject to benefit the seller in anyway other than getting the mortgage liability away from them?

With rental properties (assuming your using leverage), you receive the benefits of increasing equity (forced savings via mortgage reduction), ability to lend against the asset, tax benefits, depreciation, cash flow, and possible appreciation to name a few. 

From what I have read, the main benefit is early access to MLS for purchasing homes and saving on commission costs while selling homes.This leads to two questions: - Is simply having early access to new listings worth $600, or is it only worthwhile if I plan on flipping and selling a property on my own?

I also work in Manhattan so the proximity to the train is a huge benefit.