quiltingcandy is so correct. It is very difficult to sell any craft item and make a decent amount of money, and quilting is no different. People nearly pass out when they're told the cost of fabrics, batting and backing needed - before you even start cutting - so you won't have many customized quilts to make. It seems it's mostly the middle man who sells the stuff us home-crafters buy, who make the money.
With the embroidery machine, you may be able to make some items to sell at markets, babys' gear, dolls clothes, table runners, doileys (though I don't know if anyone buys them these days). I still love white linen like mum and her family used. But you will need to have a real interest in doing these things. The embroidery machine is a real learning curve for a non sewer, and if you need to create designs ( digitising) that's another issue altogether. Another thought - if you can learn how to put names etc on work shirts you may be able to create a small business there, those and monograms may be in demand depending on where you live.
You would benefit getting in touch with a store that sells your machine brand to get lessons on your machine, also the digitising program for the computer if they sell them. Perhaps your mum had one? Embroidery machines are a marvelous toy when you know how to use them.
I do wish you luck, and sorry for your loss.