Trying to buy in Miami .. is every house close to 100 yrs old ?

I have a budget of 650 and I’m trying to find a house in the little Havana Flagler area. It just seems like every house up to the 1.2 mil budget are from 1940’s… im a first time buyer so im just nervous about buying an almost 100 year old structure even with a thorough inspections. Thoughts ? Experiences?