Everyone below has some good ideas.
There are 3 major parts that go into any mortgage (Jumbo or Conventional) from the client perspective...
1-Credit (We have lenders who will go down to a 640 credit score on a jumbo but to get the very best options I always recommend you strive for an above 740 score.
2-Income (This is the major part of your question) This is a moving target due to tax bills/Home owners association fees as well as Home owners insurance (This is based on the part below)
3-Debts (How much money is going out to pay credit cards/car payments/installment debts/timeshares/Home mortgage/tax bill/HOA/Homeowners insurance/etc you can have a debt ratio as high as 45% total.
If you have no other debts other than the home try looking at what the potential tax bills will be as this is your biggest variance. Especially depending on the county you are moving to.
The most important thing you can do when seeing a purchase in your future is to sit with a knowledgeable professional Loan Originator. They will be able to tell you if you are on the right track to get the best deal available. If you aren't they will be able to help you understand what is needed before you embark on one of the biggest financial decisions you will be making. I hope this answered your questions. If you have any further please do not hesitate to contact me. Good luck on the house hunting...
Senior Loan Originator
Ardain Mortgage Corp.