Yeah, the most time-consuming things are definitely the titles. It's pretty ridiculous that 5 max titles translates to 1 measly HoM point. Just the idea that getting Legendary Cart is only 4/5 of a HoM point is mind-boggling.
Unfortunately, it would be pretty difficult without the other two campaigns. You could get 3 or 4 minipet points, depending on how much "barely played" is. You could get 3 companion points pretty easily. You'd get 3 honor points just by default. Armor would be difficult for you. Not only can it be quite pricey, but the armor sets that give extra points are crafted in the other campaigns. (Obby is probably out of your reach.) Finally, you can get like 2 Oppressor weapons by doing War in Kryta, but it can be time consuming. The other weapons are likely to be out of your reach, money-wise.
Here is the
calculator.