Buy a tractor for which the size will do your most important and frequent tasks without straining it. For the odd task that comes up occasionally, you can either rent or just struggle a little with the tractor you own. Snow blowing and tilling take a certain amount of PTO power and there is no way around it. Figure the size of blower and/or tiller you want and then do some figuring. Likewise on the loader. But with a loader you can often break down the size of the job and just make more trips. Works well for gravel and dirt and such, but if you regularly need to unload a 1500 lb pallet, then you have a minimum in that regard. Keep in mind that loads on pallets put the load center way out further than a bucket of stuff, so de-rate your loader capacity a bit when figuring palletized loads.
I'm a Mahindra dealer. We used to sell a 2015 model. It was heavy for it's size and just a really nice unit, similar to the CK20. If a customer came in and needed a stout tractor with good lift capacity and pulling power, that did the job. If he then said he wanted to run a large'ish mower or tiller or blower, we knew we had to go up in HP. For your needs, I think a medium frame (vague term I know) compact such as an "L" series Kubota or a 3016 size Mahindra or the equivalent Kioti/Bobcat would suit you well.
The spreadsheet idea? Well, I do that sometimes, but you can get "sucked into the vortex" as we like to say, and end up splitting hairs about a small difference in hydraulic flow, turning radius, ground clearance, etc. The key is to just pay attention to the things that matter for your application. 7.2 vs 7.5 gpm on a pump really doesn't matter to most folks. Nor does 8.3 vs 7.9 inches or ground clearance. Narrow the search to a few quality tractors that will do the job, then further narrow by available quality dealers, then go sit on the tractors and make sure your knees don't bump the steering wheel or the loader control isn't in a bad spot for your bad right arm or whatever. Drive it also, some HST tractors are quiet, some have loud pumps, some are smoother than others.
I bet whatever you get you will love, as long as you do not short yourself on PTO HP for your snow blower.