Commodity Investing : 10% #income #trade for elderly

My mother in law is an elementary school teacher in Taiwan. She is about to retire but suddenly the retirement in Taiwan became a problem. Recently the government employees were found to be "greedy people" and based on this discovery their pensions were decreased nearly by 50 %.  Now my mother in law is looking for sources of additional income and asked me to make a trial investment ($3600 USD) for her.

This is how I invested her money to get ~10%  of interest per year ( tastyworks trading platform was used to minimize trading fees) :
1. bought 200 SLV @15.6;   sold 2 Jan 18,2019 16 Calls @1.25; bought 2 Jan20, 2019 11Puts @0.04.
2. sold  1 Oct19, 2018 15.5 Put @0.83; bought 1 Jan19, 2019 11.5 Puts @0.04. That gives  ~ $400 of maximum profit in 300 days.

Since silver is at lows of the commodity cycle the income from this small-scale investment is going to work similar to real estate investing.