I stayed in Vung Tau for a few weeks and liked its slow, salty vibe. The city feels lived in. Fishermen in the morning. Coffee shops full of laptops by noon. Hot and humid most months. Rain comes fast in the wet season but clears up quick.
Cost of living is easy on the wallet compared to Saigon. You can find a sea view apartment for less than in the big cities. Internet is usually good. Fiber in apartments. Lots of cafes with Wi Fi. Coworking spots are small but useful.
Things to do are simple and fun. Walk the headland to the big Jesus statue. I joined a messy beach volleyball game at Back Beach one Sunday. Night markets and cheap, fresh seafood. Most travellers enjoy the easy trips to nearby islands or just sitting on the sand.
The nomad crowd is smaller here. For some, this will be amazing. If you want a quiet place near Saigon, Vung Tau is worth trying.