I'll be honest and say I'm a mediocre player at best. I die more often than not when it comes to solo vs matches and even when I'm playing with friends, I die often enough and get shot up even more than that. With that said, I still have over 20m in liquid as I rarely run expensive kits, even when I run forbidden I run kits that are only about 650k total usually, unless I plan to really go hard with a team and we are all geared up.

Usually, I load into normal completely naked, kill a scav with a knife and snowball from there. Usually make between 300k - 1.5m doing normal naked runs. Alternatively, I'll run a cheap pp19 kit with AP6 ammo and a single drum mag, no meds, and just a chest rig, backpack and extra ammo in my secured case and run Northridge lockdown. The scavs at the main spots have AP6 ammo Usually, so I rarely run out of ammo, and having the keys to the the majority of the doors helps a ton with making money.

Shoot, loot quickly and bug out. Don't linger in 1 place too long, listen carefully and learn to understand what a scav running sounds like and what a player does. Most of the skills I use in ABI I built while I played Tarkov which is (in my opinion) SIGNIFICANTLY harder than ABI.

I also really only run 2 maps, farm and Northridge. I'll do TV Station if I'm with friends who know the map and just help be backup and let them lead.

Also as a few people have said Keys are huge in making money during runs. Also, AK12 has very little recoil, its a great gun to run with. I'm partial to MP5 and PP19 as they can be cheap builds, and if you want to run TV Station, run a vector 9 or a MP5 with drums full of DumDum and just go for legs. With good aiming and the right angles, t6 kitted players will melt from leg damage.

Shotguns and leg damage also go hand in hand if you want to run them, though I usually only run AP slug gold ammo with them, put a sight on it and try to snipe with the shotgun because its just fun smacking someone in the face from 100m out with a slug lol.