getting cheaper rates directly from TD
that is very interesting. I have been doing mortgages for 20+ years and don't remember TD having better pricing on a regular residential product.
Regarding your question you posted, I agree pretty much with what the previous response was but will add.. typically the rental income is based on the appraisal that is done for your purchase and no lease is needed. The question if the underwriter will request a form 1007 with the appraisal, but that is pretty standard for using income to qualify.
Keep in mind there are some requirements;
if you are currently renting your primary and you don't have history managing rental properties, you can only use enough to cover mortgage payment (PITI) no excess - meaning you cannot use the additional rent to qualify, just to reduce your payment...
if you are living with family i.e. no housing expense, you cant use any rental income