On our most recent purchase, we bought a home with an assumable loan which allowed us to reduce our monthly mortgage payment by over $1,100 because we assumed a loan with a 3.08% rate instead of taking out a new loan (at that time) with a 7.5% rate! 

Most lenders do have similar processes.Most of the people who will advertise their services to you here on BP are brokers for direct lenders.Most of the Brokers on here charge an arm and a leg for their services which is the reason why, initially, I did not utilize private lending.I'd be happy to recommend the Broker we use who is great at what he does and is very reasonable when it comes to the commission he adds for his services.We do a lot of investing just outside of Charlotte in the York, Chester, and Lancaster Counties.

Some grants are deferred payments, or will be an additional amount added on to your mortgage. 

Of course they will do a mortgage but you will need the 25% down payment. 

@Matt M AntonioFinding a lender who understands and specializes in working with self-employed individuals, especially in the context of Non-QM (Non-Qualified Mortgage) products, can be crucial in your situation.

If there is a loan involved, you must have the mortgage companies' permission to transfer ownership.

I own MTR's in a San Antonio medical center and I can give you this advise: Traveling nurses/professionals are looking for small accommodations (lower price point), they are concerned with safety, as they are usually women traveling alone, well-lit walkways by their parking spot, private entrances/bath/laundry.

But outside of programs that are out there that doesn't do a whole ton for your terms of your mortgage. 

You want to invest just to have a place to live and potentially offsetting your mortgage payment by renting out the vacated rooms or having x amount of cashflow in the future?

I have a cousin in Florida that is moving and would love to come to an agreed price on their place but just take over the mortgage instead of securing my own loan as I am looking for it as an investment and would be required to do 20% down (which I would not have).