I've never owned a truck. So I am buying truck. I have always been a Honda and Mercedes car guy so it will be a significant change but I need a vehicle now that will be more rugged and get me wherever I want to go in any weather. More specifically, I need to able to get to a hospital in Toronto on a few hours notice no matter the depth of the snow. I have really been tied down looking after my mother who has advanced Alzheimers so I have not had a vacation in years. Now that I have run into some serious health issues, I have had to create some space for me to work on me alone and so moved her into a long-term care home just this morning. I promised her I would do everything but wipe her ass and I failed. I have never had a goal in my life that was so important, that I worked for years on without success but here it is. Yes I know all the reasons I did not fail but that is how I feel. I have decided to not work until I am better and thus need something to take me on adventures to the greatest extent that it can until my circumstances change. Working really hard on changing to a low stress attitude and lifestyle. I just want to go to the desert solo and do yoga for the winter and I even have to retrain my brain to not rush that, cause it aint going to happen for a while if at all. I have a great sense of urgency that I have to tamp down. If I have the opportunity in the spring I would like to turn the truck into a full off-road, off-grid unit (solar, thermal, kitchen, bathroom, etc.) and GTFO on a very long road trip. Fingers crossed.
When you have given all you can to the point of breaking yourself, you have not failed her. My wife's sister just died from cancer. She was in hospice for mere weeks, and between her husband, myself, my wife, my wife's sister, my wife's brother, and both of her parents, there weren't enough of us to give her all of the care she needed. We all gave her every bit of what we could. We were looking into a full time nurse right up till the end. I'm sure you already are looking at it this way, but it's worth being mindful (meditating if you will) of the fact that in taking care of yourself, you'll be ensuring that you can take care of her to the best of your ability.
You have done right by your mom. It’s good you are trying to do right by yourself. I considered a pickup for the first time this summer. What are you looking at? They haven’t made small ones for quite a while it seems. I don’t want one of those monsters that look like Stompers, but I do think a light duty pickup would be useful.
Initially the mid-size Chevy Colorado ZR2 was my choice but it turns out I can get a ZR1 with the same build without the AEV branding for $6,000 less. All go and no show options (except stereo). Then add a Roof Top Tent, etc. etc. 
The Ranger was considered but not nearly as good as the Colorado or Tacoma. The Taco is more expensive, is not as powerful and the electronics package is wanting. More after market support and better resale value though.