Level 10 building achievements too hard? -- Completion takes around 20 months!

Sugar lump system  

So, in a recent update, achievements were added for the sugar lump leveling system. Overal, a very nice concept with lots of potential. For those who haven't caught up on this update: you can level up your buildings by spending sugar lumps. You usually get one or two per day. Every level increases your building's CPS by 1%, and every subsequent upgrade costs one more lump than the previous upgrade (1 for level 1, 2 for level 2, and so forth). Reaching level 10 in any building will unlock an achievement for that building.

Maths, yay.  

To reach level 10 in any building, you need to spend 55 lumps in total! Considering there are 15 different buildings, you need 825 lumps to obtain all achievements for upgrading your buildings, and then you can't even upgrade particular buildings to any level above 10, let alone spend any lumps in minigames. With an average yield of 1.5 lumps a day, this should take around 20 months to complete.

My point  

Now I've personally been on my legacy for 489 days, and before two updates ago, I only needed two more achievements. I love that there is more end game content, but as for the achievements you can obtain by actively playing in a reasonable time span, I've already gotten those within a week after last update's release.
The achievements I've got to wait for, will take around 40 days each now, which seems like a pretty long haul. And there is no way to speed this up. Wouldn't it be a better idea to lower the level cap for each achievement? Or, alternatively, create achievement for reaching at least a certain level on all buildings. (For example: reach at least level 1,2,3,4,etc. on each building). I made a table to show how many days it would cost to obtain all achievements with level caps from 1 to 10. A cap on level 7 would mean it should take almost a year to obtain all the achievements.

In short, I think it takes too long to obtain all achievements from the recent update, and even an active playstyle can be of no service here. Dedicated completionists will literally have to be patient for over a year if they want to complete all achievements, which, in my opinion, is a bit too long.