I use my FIL's old desk that was given to him when he graduated from seminary in the early 50's. He wanted it to stay in the family and none of his son's wanted it, so he gave it to me. I had my husband shorten the legs so that it would be a good sewing height. I sometimes have to take the center drawer out to sit nice and close to the desk comfortably for long periods (like when FMQ) but when I'm up and down piecing and ironing, the drawer doesn't bother me. It is a huge desk with drawers on both sides and little
flat surfaces that pull out on each side above the drawers.
I think you could find something like this in a thrift or resale store in your budget.