If you have a low interest rate, consider a HELOC for value-add BRRRRs or flips. 

And it's a rather low bar to get over for anyone wanting to continue to wholesale. 

In my state i have no such requirement on security deposits but i question the feasibility of doing this as well as how will anyone know as long as you have the means to pay the tenant their deposit when they move out. most banks charge for low balance accounts.  

That said, if you only have a few "residential" rental buildings, most direct carriers can get you pretty low deductibles on their stand-alone policies (State Farm, Allstate, Farmers, Nationwide, etc.). 

A $60K down payment will get you a $300K property (assuming your income is high enough and debt low enough to qualify for a $240K mortgage).

HELOC's are good if maybe you don't have a deal, but want to keep the money ready to use and the property has a low rate that you don't want to lose. 2.

@Adam OrtizRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

This is all indicative of a low interest rate environment. 

Down payments on DSCR purchases can be as low as 15% right now, and as you noted, they don’t impact your DTI.

Where trust is low, though, things are slower or more expensive or both.- Understand that you can have never more than 2/3 of the following:  Fast, Good, and Cheap.