The main chord progression of this tune features an A♭ major chord for two beats of the first measure, C minor for the last two beats of that first measure (falls on beat three), and B♭ major for an entire bar, repeating over and over and… over. Using the image above, you can now analyze this progression as IV major, VI minor, and V major.
It’s important to note that I’m not a banker, realtor, or CPA. This is just my perspective and understanding. Before making a big purchase like this, be sure to talk to a professional. Every situation is different, even if the broad strokes may be similar. But hopefully this post has helped equip you with some knowledge to be prepared and get the loan you need.