How on EARTH did you amass $200K if you genuinely believe there is a way to achieve a 25% return WITHOUT BEING ACTIVELY INVOLVED?
There are many small businesses that could be started with 200k and met you 50k- however you are unlikely to yield much of a "passive" income. In fact, it will probably take a lot of hard work, skill, and smart decision making just to hang on to your initial investment.
There might be, but it would be really hard to find. If I knew of anything I would definitely be investing in it.
The key problem with your request is the "passive" part. There are lots of business opportunities where you could combine your capital with a lot of hard work and could quite possibly get much higher than a 25% return on your investment. Unfortunately though you would need to put in the work. Keep an eye on the stock market and real estate prices, when you find something with an rate of return of 25% that is safe, go for it! They will be very hard to find though.
You can use this calculator to help. Put 25% in for the discount rate. Any stocks or other passive investments that are priced below the price the calculator finds will meet your criteria:
http://intrinsicvaluespm.yolasite.com/
Save the $200k, find a job that pays $50k
Wait for the coming collapse and invest in whatever is left standing.
not legally.
Let's say I have $200k in capital. Is there a business that could get me at least $50k every year in passive income?