This can be done both solo and in coop, but coop is highly recommended (2 players). Both will be covered though. (This solution is not based on Pro Framing Frame, as it is much easier to do it normal on Overkill and get good money)
Recommended Skills (All Underlined and in Bold are high priority picks):
*** Spoiler - click to reveal ***Sprinter (Easier to haul the gold back and forth, as it increases stamina regeneration) [Ghost Tier 1],
Fast Hands Ace (Pack the gold faster and save time, but it's a very low priority) [Ghost Tier 2],
Cleaner Aced (Allows you to bag and move bodies, very useful for any stealth mission as you can pick off guards in more open spots, and then move them away to avoid detection)[Ghost Tier 2]
Shinobi Aced (Allows faster movement in crouch and walking mode, as well as silencing any kills you make. This is obvious why it's a good choice; you're even more quiet!) [Ghost Tier 3]
Martial Arts Basic (Higher chance of knocking down an enemy when you melee them. You'll want thin in case a guard suddenly appears before you, because if you do not knock them down, they will shoot, and everyone will be alerted and cops will be called.) [Ghost Tier 3]
Endurance Aced (Longer Stamina use. It'll make it easier to haul the gold and coke, but no necessary) [Mastermind Tier 1]
Smooth Talker Basic (You can answer 4 pagers instead of 2. This combined with cleaner will make this a hell of a lot easier for you. You can kill off 4 guards out of the 5, and that can play a huge difference in the end) [Mastermind Tier 3]
Dominator Aced (You can now intimidate security to cuff themselves. I recommend using this for one guard, and just killing the other 4 and answering their page via Smooth Talk and moving them via Cleaner) [Mastermind Tier 3]
Transporter Aced (Move and throw bags farther. This is good for moving the gold and cocaine) [Enforcer Tier 1]
SOLO:*** Spoiler - click to reveal ****** Spoiler - click to reveal ***The reason why solo is not preferred is due to the fact that at the end, it becomes a pain to get the gold up, as well as moving the coke. Here's all the steps you will need to get this done.
1. Make sure pre game that you equip the Two Piece Suit, and the weapons you have with the best concealment, as well as one of them silenced (I recommend either a pistol of your liking or the CAR-4). Also put on ECM Jammers, to jam the cameras if you need to kill a guard near its sight.
2. Once in the mission, the first thing you might want to do is take a good look in the cameras, to spot out which entrance is optimal to enter. Once you've decided which one, open it up via lockpick and make you way inside.
3. Start taking out the 4 guards, answering all of their pagers one by one and moving their bodies in an isolated spots (behind the closet doors and the bedroom are wonderful choices) so the last guy does not spot it.
4. Dominate the last guy, and take out all 5 cameras.
5. Either search around for the 5 items, or go up to use the laptop to find it, and run back down over and over to get it all.
6. Put all of the devices up at the top of the roof, and let Bain do his thing.
7. Find the vault. It is hidden behind one of the single bookshelves in the house, so you should be able to find it after moving the right bookshelf.
8. Plant the cocaine, all of it on the shelf next to the vault.
9. Once the vault is coked up, follow Bain's orders at the main desktop and eventually you will finally be able to enter the vault.
10. Here comes the pain: when you deactivate the laser, you will probably only have time to grab and throw out one bag before the laser grid is back, so you will have to deactivate, take gold, throw gold, run out, run to the desktop, and repeat until you have it all.
11. Move all of the gold to the rooftop to the zip line.
12. Escape. Enjoy the trophy and loads of money!
Coop:*** Spoiler - click to reveal ***1. Both should have a suit and a silenced weapon, or one ready for failure in light armor.
2. Once ready, one will enter in, and the other should man the cameras inside the paintings.
3. Eliminate 4 guards, and dominate a guard, then destroy all cameras.
4. Spot as many items as you can via camera, and then team up and search for the rest.
5. One brings it to the roof, the other search for the vault.
6. Throw the cocaine in between one another to quickly get it down to the vault.
7. One stands in front of the vault door, one at the desktop.
8. The one at the desktop should deactivate it once you are standing in front of it, and the person in the vault should throw out 2 - 3 bags and stay in there. Then he should deactivate the grid and repeat again until all are out. One last time for you to get out.
9. Bring all of it to the roof so you can zipline it up.
10. Money time, Get your PAYDAY, trophy, and loads of money.