If you own your own business and it's very profitable, train someone to do your job and hire him as manager, It will be a little bit of work to check up on it, but much less work. Before buying a house, make sure it makes sense. Heres an article on that
http://jlcollinsnh.com/2012/02/23/rent-v-owning-your-home-opportunity-cost-and-running-some-numbers/Also make sure you KNOW you will stay put long enough to make it worthwhile.
If you are willing to learn a lot about finding good houses to buy and rent out, you could hire a property manager to deal with the rentals, but it will be less profitable.
I third reading JLCollinsNH Stock series, if you invested mainly in stocks per Mr. Collins advice, you could likely turn that $500,000 into an inflation adjusted $20,000-$22,000/year of sustainable income that would likely not run out in the next 60yrs or so thanks to the increasing value of the Stock Market. Although, not quite the 30k you need, it will help a lot.
However, if it was me that had $500,000, I'd probably put $480,000 into a Vanguard account and invest it all into VTSAX, retire and live on $20k/year.