The whole system for $200 or less? Good luck. You might find the pieces on the Gear Swap forum here. I do know of one system that meets your price point:
Six Moon Designs Skyscape Scout
$125 and 34 ounces without pegs
The fly is ripstop polyester, not silnylon, so it's heavier.
For $225, the same tent (the Skyscape Trekker) is available in silnylon: 24 ounces without pegs.
For true modularity, look at the Six Moon Designs Gatewood Cape (11 oz $135). This gets you rain gear and a floorless shaped tarp shelter. Stick a cheap painter's tarp or polycryo sheet under it and you've got a waterproof floor for less than an ounce. I've used the GC for years on the CT and PCT. It's my 3 season go-to tent.
For a little more protection, add the SMD Serentity Net Tent. It can be pitched by itself or it attaches inside the GC (8 oz and $120), making the total system 19 ounces without pegs for a total of $255.
Alternatively, get the SMD Wild Oasis - same size and shape as the GC but with perimeter bug netting (13 ounces without pegs for $175). Again, add the painter's tarp or polycryo floor.
If you can go as high as $260, look at these highly rated models from Tarptent: