I am researching tax deeds, which do have the potential of giving a high short term rate of return on low amounts of cash. You're in a tax deed state too. I would research virginia tax deed sales rules online and on this site closely to see if people make that work.
In my experience, the real estate. strategies that require significant cash have a relatively low rate of return. I actively fix and flip but it's taken a while and a lot of cash to start making money. I see how people make a lot of money. I can tell you it ain't easy and I'm not there yet. Whether you make money is highly dependent on the local real estate and construction markets and an excellent network of realtors and contractors.
Although I have cash, I am looking at wholesaling, subject to's and wrap financing to increase cash flow.
You have gotten a tremendous amount of good advice on this thread. I would only add
Diversify... do not throw the 75K into one deal. What is the least amount of that $75K you can use on your first deal. Your first three deals are about learning not making money.
Don't leave your job until you have a repeatable model that replaces your salary. Most of these strategies don't require a lot of hours per week. And don't put a time limit on yourself based on what you "want". Focus on showing up and doing it, that's what you control.
Everyone has had a job they want out of. You will find that doing something for your future that you are passionate about will go a long long way to making any day job survivable. But the stability of that job plays a critical role in managing financial risk for you and your family. If you see the job as part of your large business plan, it has a different aspect.