"I an't gunna work on Maggies Farm no more" Is the battle cry of BP.
Be careful jumping off that bridge.
Things to consider:
1. If you leave is there a path back to that job or industry? Many careers do not allow you to jump back in.
2. What will you do for health care?
3. Do you have enough cash to pay your bills for 6-9 months until your first deal is completed?
4. Will you have enough working capital to complete the project?
5. What happens if your first full time deal goes sideways or does not yield much?
6. Have you taken as much Fannie Mae conventional / HELOC money as you can get. Have you open as many credit cards as you can based on your w2 income.
7. Should you sell your primary home? You may consider selling, renting or downsizing? Should you try to buy a duplex and live in one side. Can you take on a room-mate?
8. Could you do something to make the J.O.B more tolerable.
9. Could you do both? Perhaps be less focused on the day job and more attention to the RE.
10. Will you / spouse be able to sleep if this is not a home-run from day one? It takes time to really figure out how to make money consistently. It is likely you will struggle for a period of time.
If the only reason you are leaving your job is because you hate it and have not been planning the move for 6 to 12 months. Don't do it, unless you are flush with cash and didn't really need the job in the first place. There are no podcasts on, "it did not work out and I went back to my J.O.B." No one tells that stroy, except your angry aunt who, "told you so".