Debt to Income Ratio - Seller Financing v Lease Option v Renting

[Josh Thomas]

Any lenders or creative finance gurus know how the Debt to Income ratio is calculated with Seller financing (Subject To Wraps) or Lease Options?

I understand rental income is only counted if they have had 1-2 years experience with this income type. 

How would it be affected with Seller Financing (Sub2) or Lease Options?

I'd like to use these creative financing strategies, but how will that affect a seller's opportunity to turn around and get a new conventional loan?