I am a newbie landlord and am going to list my property soon.When i get all the applications, I'll want to check up & screen previous landlords, where do i verify that person is actually the landlordand not a brother-in-law type thing ?

Get the application, process it, then show the house.

If insurance is required the security agreement will recite the matter and if in the body of any note, the insurance assigned should be at the option of the lender for the application of loss proceeds.

Nevertheless I am turning in loan application for pre-approval currently--but looks good for future financing.

There are all kinds of dirty little trick that owners can pull making things difficult, understand too that these owners are not real estate types familiar with applicable laws, so what they pull could be illegal, but that's the way things will be conducted unless you take them to court, more money out of your pocket. 

An applicant who I may consider next week for a rental, only due to his being the best of all the bad apples I have interviewed has recently filed for bankruptcy in the past year and forclosing on a surpirisingly cheaper home that only cost at his purchase $44K.

 * From there you have to market the property, say on Craigslist* Then when you show the property it's good to have a rental application and a credit application.  

The "liberal arts" approach would be to tell you that sophisticated investing precludes buying either equity or cash flow - we create both, not buy them.A more mathematical answer would be to tell you that the 2 most applicable measurements of ROI are the cash on cash return (CCR) and the internal rate of return (IRR).  

Once the application is made, call their previous landlords and have them comment on "housekeeping" and any animal damage.For my area, I can get top rents because I rent to animal lovers. 

And if your loan will require a committee approval, you will want to know how frequently that committee meets to evaluate loan applications; could be once a month, and if your application comes along just after they meet you could have to wait until they meet again.