What questions to ask at the economic level before buying a home

Do we have enough savings to order a bank mortgage? To get a mortgage it is necessary to have saved 35% of the valuation value of the floor: about 35,000 euros in every 100,000 euros. 20% will be to pay, the part that the bank does not finance. The vast majority of entities grant 80% of the value of the house. And 15% to meet management costs to open...