I have owned a Max 28 for approximately 5 years, 28HP - 22HP PTO, and although it does just what I need, there are times when it is lacking.
It will haul 60" Attachments, the Brush Cutter works great with this setup, the Box Blade works but fills up and this 28HP Tractor starts to stumble, I haven't really used the Grader/Scraper Blade for the road, I've tried it, but I can't tell you the full impact on the tractor but the 28HP appears to work ok in Low Range. My next and maybe last Attachment that I still haven't purchased, will be the Post Hole Digger, not even sure my 22HP PTO and 2800 lbs. will do the job or not (Hard Clay in my area).
If I was to get a new Tractor or could start over, the Tractor would be at least a 35 to 45 HP, and 50% to 100% heavier than the Max is, (2800 lbs.), so I would be looking for 4000 to 5000 lbs Tractor.
I always believe in buying larger than what is needed, but in the Max28 case, I purchased by the specifications posted by the Manufacturer, not the best move because it won't even pickup what my smaller tractor did before I sold it, the SC2450 (Used it in New England, small jobs, to move snow and dirt in approximately 2 acres.
This post may not help much but the idea is to make sure you get it big enough, so you don't regret it later on. Once you decide on a specific model/weight Tractor that should work, go one higher.
Ltr
Novice Tractor Owner/Operator