Pardon the interuption...
I too have a 2012 S10; ( i sound like you guys now
i would read these forums and wonder what an s10 was until it finally occurred to me it might be short for Super Tenere. I HAVE ARRIVED!
Anyway... All these things don't have to be purchased together/immediately. I went piecemeal, -and, one must learn to shop. Ebay, open box items, Veterans discounts, internet discounts, etc, etc. It can be pricey, just not as pricey.
I'm embarrassed to say that I intentionally purchased an Akropovic exhaust (deeply discounted, it came in newspaper and a kohler plumbing box) Arrow headers. My k&n air filter and re-flash are on my to do list. Just the exhaust and headers made it run so much better.
I got some Rox anti vibration risers, and a copycat flex handlebars from China. Some bar weights that are like 3" long from flex racing helped also.
The handlebar and triple tree clamp on the 2012 is one continuous piece. I believe from 2014 the risers were built on vibration dampeners. (I bought one off a wrecked bike.)
Anyway, any seat is an improvement. I bought a Saddleman seat while my original seat was being rebuilt. It was, -"eh", "ok". Now, when I got my seat back from this guy named Terry Adcox, I swear it was like a got a Brazilian Butt Lift! Not only that, way cheaper than an aftermarket seat. So, you might find an upholsterer to build up your seat... maybe. On a personal note, I loved the seat so much, I lowered my bike.
I don't know how tall you are, but good boots help as well as a bike mechanic you can call a friend.
Finally, I've found in this thing called life, -that when I minimize my expectations, my disappointments are likewise minimized.
Keep your head up and consider not throwing the baby out with the bath water.