Yes, I will be using these wrenches in a professional environment working at a CAT shop (heavy equipment).
That said, I'm going to hold off buying anything for now. If I end up needing a set immediately, there is a HF store only a few miles down the road from both my home and the shop.
But I would really like to wait and buy a larger more complete set that also includes */16th sizes. However I have no plans to buy anything more than a Taiwan set at best in this size range unless a set for a good price pop's up on OfferUp or Craigslist.
I was in same boat as you. I came from the heavy truck world to heavy equipment after a few year break working in management. I am also in a Cat dealer shop and have been now for almost 3 years.
The main sizes you will need for hydraulic work on Cat is 1-3/8", 1-5/8", 1-7/8" and 2-1/4". I use the first 3 sizes regularly and the 2-1/4" is only for pump suction lines 4 or 5 times a year. I wouldn't hesitate to buy these sizes singularly used off of eBay for decent brands and decent price.
I have SK brand up to 1-1/2" but I also have HF angle set to 2" and the HF combination set to 2-1/2". The HF big wrenches are OK is about all I can say about them. They haven't let me down, but I always have my eye out for used better stuff on eBay and such. I buy a fair amount of my stuff used if the price with shipping makes sense. The angle wrenches in the sizes above a needed regularly.
One type of wrench no one has mentioned is engineer/ machinist wrenches. They are single end open wrenches with a straight short-ish handle about a foot long. Most of the time the heads are pretty thick width wise so they don't spread or damage fittings. Those and a 4 lb rubber dead blow work good in places a long wrench wont fit. I used this method just as much as the regular wrenches. The ones I have were bought off eBay singularly. Shipping kills these deals if more than a couple are bought at a time. I pay $20 to $30 total for each. I like the Fairmount brand in these
Also grab the hydraulic service wrenches from HF for like $60. Use the big full size wrenches to break loose and tighten only. Then use these small wrenches for the in-between of taking off and putting on. I bought an 1-7/8" and 2" Wright wrenches off eBay to complete my needs. I have the SAE and metric sets. I haven't used the metric set yet.
I have the big crowfoot wrench set up to 2". I rarely use these except for skid steer travel motor lines reaching around behind rubber tracks. Usually 1-3/8" is the size used there and only needed if the track won't slide out horizontally easily.
I have an 1-5/8" combination wrench Evercraft (cheap) NAPA brand wrench that I cut a slot in the box end to make a big flare nut wrench out of it. It works well, doesn't spread and it gives way more options for angles than an open end wrench when it will fit over the fitting. I'm going to cut an 1-3/8" and an 1-7/8" wrench the first time I need them without a second thought.
I hope this helps.