I would say hold onto the real estate assets you have and try to learn more about investing in stocks. Out of the $105,00 in cash you have been left perhaps consider investing $30,000 in stocks and $30,000 in gold (a good hedge/insurance) and keep the rest as a cash buffer. Additionally if you can save say $15,000 per year out of your current income and invest into into the stock market (and reinvest the dividends) wisely over a period of 10 - 20 years this will eventually create a meaningful source of extra side income.
As for people saying that the yields on your properties are too low you need to consider that in the current market dynamic, most "blue chip" real estate in the world (e.g. homes in well located suburbs of cities like Sydney, Melbourne, New York, London, Berlin, etc) is selling for low yields. Higher yields would generally mean shifting to second tier locations. Just like you should not expect a high dividend yield from an ultra safe and predictable company like Johnson and Johnson you would not expect a high yield from the most prime real estate. I agree with RatInTheWoods keep the real estate you have.
As for people saying that the yields on your properties are too low you need to consider that in the current market dynamic, most "blue chip" real estate in the world (e.g. homes in well located suburbs of cities like Sydney, Melbourne, New York, London, Berlin, etc) is selling for low yields. Higher yields would generally mean shifting to second tier locations. Just like you should not expect a high dividend yield from an ultra safe and predictable company like Johnson and Johnson you would not expect a high yield from the most prime real estate. I agree with RatInTheWoods keep the real estate you have.