You don't need to tailer a suit. Most people don't. With that being said. Most suits don't fit people correctly because they never get them fitted correctly. $52 for a correct fitting suit is a small price to pay on top of the standard price. Or be like me and pass the stuff to my mother in law. She takes care of all my clothes.
Okay, I am not going to go super snob here - but I do know your taste for expensive hobbies and fine craft. You ABSOLUTELY DO NEED A SUIT TAILORED. In fact, anyone who gives a five about what they look like, will tell you to buy a CHEAP suit and spend more money on a GOOD TAILOR. You can make a well tailored, cheap suit, look like a $1,000 suit. You can easily make a $5,000 Zegna look like a $300 suit if it is not tailored well.
Two rules about suits.
Always have the suit tailored.
Never buy a black suit (except for a funeral).
Third rule is by a jacket that has shoulders that fit well. If the shoulders don't fit well, you need a really good tailor and generally to spend more money than the jacket is worth, to fix it.
Everything else - euro cut versus traditional, side vents versus center vents, 2 button versus 3 button - all of that stuff is up for debate and can change based on body type and use of the suit.
Your best BASIC all around suit? 2 Button, Navy Blue suit that is well tailored and that is worn with some variation of brown dress shoes.
About 8 years ago, I used to buy my suits at Jos A Bank when I thought I knew what I was doing by spending $800 on 3 suits. Sadly most of their suits are behind the times and were far too baggy and pleated to fit in, in today's work world. I actually have the suits hanging in the closet and I just can't wear them anymore knowing how out of style the suit is for today's day and age. They were out of style back then, too.
They may have some decent stuff in the store that you can find but it is generally overpriced. If you know what to look for, you can do fine at a Macy's, Jos A Bank, or Mens Warehouse. Out of those three, I would choose Macy's house brand in the red label variant which is their slim fit/euro cut. You also have the option to buy suit separates there which would have probably worked much better for you than having a 39inch waist tailored. Could have bought a 44R jacket and 32, 34 or 36in pants that could then be tailored where needed and far less cuts would need to be made.