and don’t get me started on vet bills!
If you have to have a pedigree fully check out the breeder and the parents. If everyone did this then the unscrupulous ones would be out of business and there would be a lot less dogs with problems which cause problems and pain which result in huge bills and sometimes euthanasia.
Keep on top of the routine maintenance (worming, flea treatment, injection etc)
Choose the right food and feed it the correct amount
Train it and exercise it physically and mentally
Don’t let it play with/eat stuff it shouldn’t. eg STICKS!
All will help keep down bills and you should be doing them anyway as most are not really ‘optional’.
Finally if you have doubts you could afford a bill for something serious then insure it.