FnEasy is pretty easy. If your wall is in decent shape and that is where you want to have your screen be permanently, all you need to do is have a quart of Behr Ultra Pure White, Kilz primer, or Glidden Gripper primer tinted to one of the various shades offered by Tiddler.
Lamp Black 0 2 0
Yellow Oxide 0 0 1
Your selection of shade will have to do with how much ambient light you are trying to deal with and the performance of your projector. If you share what you have and under what condtions you are using it, you will get good advice on what level of gray you should condsider. Not that big a deal anyway. If you don't like it, get another quart and do it again.
Mask the projected image on your wall and roll on the tinted paint. After 12 hours or so, paint it again with a matte poly finish. How you decide to deal with a border is dependent on what you feel like doing; paint a black border, build a wood frame painted black, or cover a frame with velvet. No right answer.
Another path you can pursue is the use of a ready-made substrate that you can hang of the wall and project onto. Look at the threads for Parkland, Wilson, Do-able, laminates in general.
FnEasy is a painting project, the others are more carpentry. You can easily stay below the $200 level and the 5 hours, assuming modest skill levels at whatever approach you decide to take