probably not. As you do not yet own the home and do not yet have the rental income in hand but are hoping to get this,this is not really income,just a plan to earn income after the house is purchased. Additionally,the local zoning may not even permit this. You have to qualify on income you have at the time of loan application and you don't have this income yet. You could probably use rental as income if you were purchasing a multi-family with units already rented and bringing in income & you were planning to occupy one of the units.
FHA financing is available for multi-family homes; in MN as an owner occupant, you can qualify for homestead taxes and use 75% of the rental income, proven with a rent history, to help you qualify for your loan. This way, you would be building equity faster, still have the feeling of your own space and buy a quality home for yourself more easily. Liz Fuller, 612-986-4105