The three large white eggs appear good, but dehydrated. However, if she has not had contact with a male for 7 years, they are most likely infertile. Is she housed with any other snakes?
One of the cheapest/fastest ways to set them up is thus:
Get a digital probe thermometer at petco ($7)
Get a 6qt sterlite shoebox with lid (often $1 or $1)
Get a bag of organis orchid moss at a garden supply store. Make sure it has no fertilizers in it.
Soak the moss in tepid water, then wring it out until you are only able to get a drop or two out of each handful of moss. Fluff it up and half-fill the plastic bin. Place the eggs gently onto the fluffed moss. Now wring out more moss and put a thin layer of moss over the eggs. Place the probe of the digital thermometer in with the eggs under the moss. Put on the lid. Find the warmest part of your house and place the plastic bin there. Check the thermometer regularly to see if the temps are in the optimal range.
Try to find a place that doesn't get any warmer than 84 or 85 degrees, and no colder than 76 degrees. the top shelf of a closet tends to work well.