Computer for Disabled Crafter

My old (10 years) desktop computer has finally given out completely, and I need a new one.  It is necessary for my craft business that I have a computer for scanning and printing.  I am on a limited income due to being disabled , and my craft business helps bring in a little extra money, and it gives me something I can feel good about doing and that is flexible for me, as I am disabled and can't work outside of the home.  It would mean so much to me!  I can save a little but not near enough, especially with the extra bills we have since my aunt passed away in December.  And I have an old car that is in need of repairs.  We are hoping a yard sale will help with the car repairs and bills, but it won't be enough for me to buy a computer as well, so I need a bit of help with that.  Thanks so much!