If the idea is to make it cool, boat/car gun and weight are not a major concern, then consider the Aluminum Element 4.0. you can purchase just the chassis block ($375) plus the folding adapter ($145.00) and then purchase if you do not already have a cheap AR buttstock 40-80 and a cheap flat top AR grip ~$10
You could be in the 500-600 range, depending on the buttstock and grip you select pretty easily. Now, will you have some of the benefits of higher-end components for fitment to the rifle or weight savings? Probably not. But you very well might see an accuracy increase and gain the folding, integrated Arca Swiss, bubble level, and modularity of the chassis. Meaning you can update as time goes on with higher end buttstock and grips and could turn into your dream gun. .