@David Hodge You have posted something that will draw everyone that is looking for money. They will all promise what you want and some of them may be able to deliver. There is a fair amount of Due Diligence on your part to separate the wheat from the chaff. I would recommend using all of the suggestions as ways to potentially accomplish what you are looking to do and let the money grab people give you ideas, but don't give them any money. Education is very valuable in this type of investing, as always with investing it is nearly impossible to guarantee any certain results.
I agree with @Jay Hinrichs comments above and would encourage a strategy that puts your mother-in -law in a position that loses last, not in a position that she could potentially lose up front.
I have sent a message privately and would be happy to help educate on an option that could be a good fit. This option would not be placing any money with me or any company that I am affiliated with. You could do this in your own backyard, which could increase the comfort level considerably.
Most of all I wish you well in your endeavor, and wish you well in your investments.