You must be permanently & totally disabled to qualify for disability. Since you need surgery, you will have to get that taken care of. A broken leg, even one which is not healing properly because you failed to get necessary surgery, is not "permanent & total disability."
Lots of people create online businesses, work from home, etc. You really "don't have a leg to stand on" - pun intended - for claiming disability.
Furthermore, you must reveal total income, assets, tax returns, etc. Good way to get caught for working under the table & not paying your income & other taxes. Typical sentence for tax evasion (unless you pay all taxes, interest & penalties in full) is about 3 years.