@Angilion Not much played yet, I've done a few hitchiker missions and that's it. Using a pickup at the moment for small deliveries.
Miles off from buying a house or car yet I don't even had 200 coins/dollars/whatever.
Taxi driving is decent for money to begin with. You can drive the basic taxi from L1. The more comfortable taxi requires L3 IIRC. The main advantage is that it has a comfort rating of 4 compared with the basic taxi's 2 and quite a few passengers pay a bonus for comfort. Just take any taxi job on the map and you get the use of a taxi. You pay ~30% to the owner, but it's still decent money. When you drop off a passenger, your navigation switches to point you to the nearest passenger.
One "important" thing I found about taxi driving is that the more comfortable taxi will do 190kph and will drive into the sea. The fastest road I found ends quite abruptly at the coast and the brakes aren't very good
You can drive around underwater, which brings back nostalgic memories of Crazy Taxi. You can also walk around underwater. It cost me 1000 to get the taxi towed back to a road after it got stuck on the sea floor, but it was entertaining.
I bought a basic taxi from a dealership for myself so I wouldn't have to pay a large chunk of every fare to the owner. Then I replaced the puny 4 cylinder engine with a V8 because I could. I didn't upgrade the suspension or brakes or tires. It handles even worse now than it did before, but it's more entertaining. Probably not so much for passengers as it wallows and rolls and drifts and wheelspins
I found afterwards you can use non-taxi vehicles as taxis if you choose the miscellaneous (maybe labelled as "extra") upgrades section in the tuning shop and buy a taxi licence. If I had known that, I would have bought a basic comfortable car ("Elisa", IIRC) and a taxi license. But maybe I'll save up for a supercar and use that as a taxi for a laugh. Or a lorry.
There are vehicles for sale at some places other than dealerships, too. Just parked in various places. I've seen 2 or 3, including a luxury RV for 150,000. Way out of my price range. I currently have the hilariously overpowered taxi and a very basic pickup truck and about 15,000.