Hi Vicki,
Bless you. You certainly have some challenges in life. That builds character in people, as I am told. I think using the $20 for a rental in Pueblo is a great way to start, providing you get adequate cash flow for your son. Qualifying for a loan these days isn't easy, having gone thru it lately. Also, you can usually only get a loan on a property that is already inhabitable, not one that needs rehab if you go the FHA, conventional route. Otherwise, you will need to go the Hard Money Broker route until repaired and he get refinanced out.
He can also put his money in to a PPM type program and get perhaps 6-10% on his money without having to qualify for a loan. Many investors are looking to do a JV partnership with money partners, but you have to be extra careful to go with an investor and contractor that is really experienced and all the protective legal paperwork written up ahead of time.
Good luck to you. I know you will do the right thing to provide for your son as long as you just keep educating yourself and don't jump in to anything without your own knowledge and using advise of impartial experts.