STR income count towards DTI if purchased using vacation home loan

[Brittany Stradling]

My family and I are gearing up to purchase another primary residence in 2 years. Therefore, we want to ensure that we are prepared and there are no surprised. I feel like I've read somewhere that if you have a vacation home, you cannot count the income towards DTI? Is this true?

We currently have one cabin and one primary residence. 

I would be using a VA home loan if that matter.