Switch prices can range quite a lot, since there is a decently large enthusiast market for switches. However, I took into consideration that you mentioned you don’t like to buy things you won’t use (the stock switches). I figured it would be better to suggest that you try some switches before you pay for any in bulk.
As for the keycaps, they are not bad. They’re not amazing either, but for what you pay ($15 additional for switches and keycaps) you aren’t gonna beat the price. I just imagine most people are happier having some level of visual customization, and you can’t really see the switches unless you have a keyboard with “floating switches”.
By the way, if you are comfortable keeping the keycaps but swapping out switches, you may also be interested in the Keychron V8. It has somewhat of the ergonomic layout of your current keyboard. It’s only available with blue switches, which are clicky and wouldn’t be appropriate for working.
Sorry that this is getting so long, but one more comment: if you decide to go the barebones route, you will need to make sure you find a keycap set that has 65% compatability. Keys that are frequently missing include the bottom row cluster to the right of the spacebar, and the far right column of keys as well.