Hi There! Your down payment would 3.5% of your total purchase price. That will give a great idea of where to start your savings.
Also, as with any loan there are closing costs and fees associated with the loan. A good amount to save here I would say would be at least another 3000K.
In some instances a good negotiator such as myself, may be able to get closing cost rolled into your deal or paid for by the Seller.
I'm a veteran resident of the Arlington/Mansfield area....would love to help you!