@Michelle R.
I have been mapping out a similar scenario that involves the purchase of a personal residence. Many real estate investment training suggests combining buy and holds with some fix and flips. Here is my proposed approach:
First, I would not put all of the cash in one place. My RE attorney (title company) recommends that 1/3 should be put away somewhere out of reach.
Second, 1/3 of the cash would be used to purchase a 4BR/2BA residence with some rooms to be used as AirB&B style rentals. The passive income, if 1-3 rooms are rented for half the days in the year, at $75 - $95 per night, ranges from $12K - $50K. This house, purchased with cash, can be refinanced within 4-6 weeks, according to a recent Bigger Pockets podcast #233 (click). In my proposed scenario, a H.E.L.O.C. (home equity line of credit) will be opened for up to 90% of the home's value.
Third, the rest of the money will be used for fix-and-flips, in tandem with the H.E.L.O.C. as needed. The profit from one fix-and-flip can range from $50K - $90K per house with a turn-around of 4 to 8 months. These would be done one at a time, with the initial investment rolled into the next project, once recovered from the previous one.
There are self-directed IRAs that can be used for real estate investing. Opening an account with an organization that offers this kind of product (like Midland) may be an important part of your strategy well worth considering.
Although this scenario might not work exactly for your situation, maybe, portions of it may inspire you or solve one or two challenging aspects of your situation.
I wish you the best!
Cheryl