I don't claim to make tutorial, but here is some tips that I used and never had problem with making money:
- do not rob bank if there is more than 10 cops online and too few most wanted players, unless you have a team of 4+ players. there is some times when a single player just can't be a criminal. do some other stuff or serach for a team,
- do not buy unnecessory amount of ammo. 50 sawns/combats, 200 uzis/mp5 should be enough for a single robbery and it's not a big deal if you die and loose it. If you sucesfully robbed a bank, but spent your ammo, you can buy some more and you should still be in the black,
- If your aim is to make money, do not buy sniper rifle, deagle, grenades. Only buy M4 if you will drive by with help of your teammates,
- don't get involved in unnecessory fights. if someone is shooting at you and you have all the possebilities to run, then run. use your weapon only to defend when it's necessary,
- do not spend money on vehicle armour unless you have a team. it's expensive and if you get outrunned by cops, additional health won't save you, you will die anyways,
- if cops are active, don't show up in active city with stars without full health, and preferably without full armour too. you can buy health and armour in inactive city.
- if you are not most wanted and cops impossibly outnumbered you and there is nowhere to run, don't fight and accept your destiny. your sentence will be shorter and perhaps they will save your life so your K/D won't get worse.
- try to bribe cops with 500$ whenever is possible, especially when you are being cuffed.
- if bank is closed and you have wanted level, loose it in inactive city or bribe a cop and wait for 6:00 to rob again.
Following these tips, you should be able to earn money, but such gameplay may not sute everyone becasue you wont' DM, hunt, fight much and you won't feel yourself cool.
Everyday there are almost 15/21 cops vs 50 (or less) civilians and most of them are really good players, so its very hard to evade because a squad of 2 or even a coptank will rush to you for sure.
You constantly Need to call flare, repair car,add bullet resistance tires and they are useless when the entire PD rush to you because you are the only one MW and all others are cops or do jobs.
By the way you cant expect to survive only with a few weapons for drive-by because everyone DM in close-range and you cant do nothing only with M4,tec9 or uzi.
Cops constantly looking for suspects like a dog for food xD, they will catch you even in the damn middle-air with rustlers/sea-sparrow.
Try to rob a bank, when you take your ass out of the bank with the Moneybag the cops already blowsup your tires even the car and they will fight in close-range even with some mf camped somewhere spraying with M4 or sniping.
If you are so good to take them all and try to reach hideout with your car there will be roadblocks and spiketraps inside the hideout (tierra for LV, the tunnel for SF, and cops spawns in your way to castillo LS).
Try to bribe these mf with 500$... They will piss on your face After taking you down even if you are a non-threat because a lot of them are newbies that basically play as cops rulebreakers.
Trying to evade Is also impossibile even if you have a good team, they will spawn again and in 1 second you have to run again.
Why we have to run from fights? I mean.. its fucking GTA , the main concept is to clap cops and be rich but they are too overpower, too bonuses, too many rulebreakers, and TOO MANY OF THEM, maybe add a balance, i.e: 50 players only 10 can be cops or max 13 i dont known...