My sister is looking to buy a house , older home ,old screw in fuses on the fuse box everything works but is it safe with new electronics and more juice being drawn, also would it pass a building inspection

I would recommend a upgrade to a new breaker style box sounds like the service might be only 100 amp if so I would upgrade to 200 amp to handle the loads of modern day equipment might put on the electrical system.. expect to spend about 2500.00 to have this done depends on what part of the country you are in..

Work the cost of upgrading the electrical system into the purchase of the home.