Transitioning to TH10

Moving from TH8 and seeing how long it took me to max that with builders going literally non-stop, I assumed TH9 would be a lot longer. I have assumed wrong, as I'm already on the brink of maxing defenses with just cannons, archer towers, and a couple mortars left to do. This will only take a couple of months (maybe overestimating?) which leaves me very little time to work on walls and Heroes, especially when I'm focusing on troop upgrades and finishing up defenses.

At the very minimum I want to do lvl 9 walls (13 lvl9, rest lvl8) and I'd like to get my heroes to lvl 20 (currently at lvl 10 each), but that tacks on about 70 days IF i keep them busy nonstop, and it's just not likely that I have that much time or will to spend farming for just those things, not even thinking about defenses left and lvl 10 walls.

So, that leaves me with the question I ask to all of you who have experienced this transition, how long should I spend just doing walls/heroes after defenses are maxed before making the final run to TH 10? Really only would like to hear from those experiencing/have experienced this transition and your experience with it. Ignore signature, outdated.

Thanks :)

I found upgrading heros with lvl 8 walls at a max th9 very annoying.

Moved to TH10, maxed infernos and now its easy. Getting from lvl 15 to lvl 20 was just as easy at th10 than it was from 10 to lvl 15 at th9.

The extra drill, plus the ability to keep people from taking DE made me want to jump to th10 before lvl 20 heros.

Once you have your lab upgrades done, and defenses maxed, lvl 15 heros, i say jump.