If you are positioned well going in and a swing comes, you can ride it out and it won't have any effect on you.

What are some good landlord friendly, easy to use, cost effective websites or apps to use to receive rents?

This triggers and exponential effect on your COC and ROI way beyond the % of commissions paid.

What would make this service efficient and effective for you?

We want to use VA loans when possible, how will this effect our business structure when acquiring new properties?

The end counter runs could be wider to be more efficient/effective.  

If your current / target portfolio is a handful of SFR, you may be better off going with a more cost effective option.  

The tax credit cannot be larger than the owner's annual federal income tax liability, after deductions, exemptions and other credits.PITI is currently $950 - PMI does suck and is 83 bucks a month, I've recently learned that my insurance was maybe a tad bit to high and I have since reduced it by $22/month but wont go into effect until 10/2017.

These effects can increase your score within days or weeks of making significant changes.

Now if you are strictly doing flips then it may be more effective to only knock on doors that are one of the following:Sheriff sale propertiesPre foreclosure 90 day late 2+ year late taxes Code violations Owner occupied evictions (usually multifamily) Expired listings FSBO This is more time consuming and requires route planning but for flips this is the list of people who have a higher chance of having distress & would give up equity to solve that  problem & close quickly.