Assuming this is a serious question...
Ironically, you probably want to buy a 'poor' quality Gi. A good quality gi has very thick material and has stiff seams to withstand all the yanking and pulling. Cheap ones tend to be much lighter material and won't last long if trained in but might be more comfortable for sleeping in.
Also, any I've seen or used rely on the belt to keep the upper body jacket closed over. Unless you always sleep on your back, the big knot is going to be pretty uncomfortable. There may or may not be a small inner tie on the closed side and the pants are usually tied in some manner.
You will need to be as tough as you are hoping to look as I just can't see these being comfortable to sleep in.
Avoid the temptation to bleach out stains. It seems to destroy the cotton threads in the seams before their time.