I would diversify.
First, 400k would go towards securing a home for myself and a low-maintenance rental in an area with promising equity returns.
(Since my brother is in land development and I work for a home building, we are buying land and building new from the ground up. Not everyone has this option though. )
Then as a 1099 I would do the max contribution in into a IRA (20% your income) -20k roughly
now you have 380k
Stocks: I would find companies that have strong fundamentals, high dividends and good PE ratios that I want to be invested in. With 200k over the next year I'd build a portfolio with a goal of 12% annual returns. (There are private companies that target a 12% return each year you can invest with as well, if you know the right people)
You've worked hard so take 20k and spend that on fun and family.
I would set aside 5k for an accountant and fees required to register your LLC/ S Corp, non profit, licenses ect...
Now you have 155k cash to hold for repairs/upkeep on your property or personal emergencies.
Good luck!