not really a suit unless the coat and pants are made of the same fabric. this combo is probably one suit and one sportcoat/pants outfit.
Anyhoo, young male suit wearer (not every day, but usually at least four days a week) here. I have seven year round suits: two navy, charcoal, navy chalk stripe, charcol chalk stripe, grey glen plaid, b/w houndstooth. I have tow summer suits: khaki poplin and blue seersucker. I also have a blue blazer, a camel hair blazer and a herrignbone tweed blazer, and five pairs of wool trousers (charcoal, khaki, blue, olive, olive window pane). Another the big cost is shoes. I have four pair of lace ups: black cap toe, black wingtip, oxblood/black saddle, brown split toe, and tow pair of loafers (brown and black). Belts are easier. Only have three: black, burgundy, and brown. I get the pants (suit or seperate) cleaneed after about eight wears (every 2 months, generally), but I get them pressed after each wear. I clean the jacket rarely - usually only if there is a stain.
I’ve read that you should clean your suit once a season (dry cleaning does a number on the fabric)