Yeah with the short throw of LT150, 16-18 feet will give you too large of an image. At 14 feet, I get 100" wide. I'd try for 13-14 feet for 96-100" wide. Screen will be too expensive otherwise. If image is too large, you'd get whiplash following the scenes and rainbows are more likely if you have to move your head to follow the scenes. Plus screendoor and artifacts are more visible with larger image. Brightness will decrease with a larger image too.
As far as breakout vs. component. Breakout will "break" the VGA to its individual signals R, G, B H, V using red, green, blue, yellow, and black wires. Component will split VGA into just R, G, B and will be cleaner looking (otherwise you'd have 2 extra, dangling, unused wires). Component mostly terminates into RCA connectors and breakout usually terminates into BNC connectors which means you'd need RCA to BNC adaptors ($2/ea.). Price is about the same for both after you add the adaptors.
www.a2zcables.com has 20 foot VGA-->component for $40 and it's pretty good quality. It's probably the best deal you'd get on this type of cabling.