I would be capping it, but I will need it for the husky in the summer.That seems high. I had this line replace by our indy shop and it was a couple hundred including a test and re-charge of the AC system. That said I had purchased the OEM AC line, so I wasn't paying the mechanic for parts cost.
I replaced the exact same line. If you use factory parts, it will cost a few hundred in parts. If you buy an aftermarket Dorman splice kit, it will cost less than $100 in parts. The hose is very easy to remove with open ended wrenches. It is also very easy to replace. The whole system needs to be vacuumed and then refilled with R134A refrigerant afterwards. I did it at home for about $100 total cost.
Just make sure you know exactly where the leak is coming from, so you don't have to replace both tubes. Looks like your system has dye in it already, so it shoudl be easy to find with a black light. Just pull the foam back as far as you can to see if you can locate a pin-hole.
You can probably borrow the vacuum unit from a parts store...maybe once COVID is over...If you "cap the system", you are effectively removing half of your air conditioning capability. Like anything, fix it correctly.
I am curious did you have to replace any additional parts other than the AC line? I suspect this is something I will be tackling in the next week or so myself.