Natural Gas Barbeque Can I Connect 2 Small Propane Tanks To A 30" Gas Stove?

Can I connect 2 small propane tanks to a 30" gas stove? - natural gas barbeque

That means I convert my 30 ft "sovereignty of natural gas, propane, I can connect 2 together with (gas-grill type) tanks for my 30" gas stove? What is the pressure of work needed to run my 30 " sovereignty? average 3 times a day to cook, how long the tanks.
Companys like to buy propane tank and expensive, and even though I rent, because they want to meet twice a year, but the only cooking I do not use it much.
So I am CONSIDERING, with 2 small tanks of 20 liters of propane, there are issues of security, why can not I?
Thank you for your feedback.