What is the most profitable type of lending for an investment property?

Large "white collar" institutions vs smaller "street wise" management companies.

What I found helpful is participating as LP in a syndication as a backdoor.2) work on your personal development. you need to see yourself operating as a deal sponsor.

Here in the US the Appraisal Institute has conducted extensive studies and has found that PV adds $20k in value for every $1k in energy savings, for owned systems of course.

Although I am a firm believer that institutional education is failing us, I want to preface this conversation with the facts that I do have my undergraduate in Business Administration and I am currently working on an MBA at UNC Chappel Hill. 

when it comes to smaller commercial banks its boils down to a few things these are the institutions I have used for the last 25 years.. 1. 

This mostly pertains to municipalities that chose to be part of the Rent Stabilization Program which of course NYC participates in.

It's kinda frustrating that the size of the deal is too small for institutional investors but too large for retail investors (non-accredited investors).

@Gary Reven a deal like that is an institutional play.

will depend on your expectations and business plans.For institutional residential loans, the shorter amortization period will result in a higher P&I payment and you will build up equity faster than you would with a 30 year even though that payment is lower.