Suite Jacket with regular chinos/wingtips?

meh really depends on the suit jacket, but I'd say probably not because most orphaned suit jackets LOOK like orphaned suit jackets.

Not sure if srs...

Target actually currently sells an unstructured cotton blazer/sport coat for about $30 that was apparently featured in GQ.

I tried it on a litttle while ago for the heck of it. I'm a 43L and the large didn't look good on me at all. Sleeve length is generous, but the body is short. From the back view, the center vent looked really stupid and cheesy being smaller than normal. Overall, the jacket looked cheap and childish on me. Maybe if it happened to fit you well it'd be passable, but I'm not sure.

Don't wear an orphaned suit coat. A blazer or sport coat is what you are after. I thought the Target one had a terrible fit despite really wanting to like it. Since you mention Target, I'm guessing you are looking for a cheap kick-around blazer. The INC brand at Macy's sells ones from time to time that have a great fit with some tailoring for very cheap. Mine are 100% cotton, very lightweight, and I got them at the end of the season for about $15 each.

Well to be perfectly honest, at one point in time i had a charcoal sports jacket from Brioni, i also had a charcoal suit from Brioni. Apart from the button color on the sports jacket it was hard to tell them apart. Besides that a lot of brands now also make sports jackets in solid colors with the same buttons they use on suits, same type of pockets too. I mean in essence a sports jacket it constructed pretty much the same way except that it is meant to be worn with odd trousers, so even if you had a grey sports coat with a purple windowpane pattern it could very well also be part of a suit, same with tweed. The only thing i have against wearing a suit jacket as a sports coat is the fact that the fabric will have uneven wear on the jacket as opposed to the trousers.