I built a lay-down desk

You probably have seen an ads for the altwork desk a $7000 desk that let you work laying down. Spending a big part of my day in front of a computer I want to have the most comfortable position as possible, but well $7000 + $1000 for the delivery seems so expensive. There is also this company but this is still about $4000 all included. Let’s be creative and build it myself.