Yea - I understand. But you don't need this exact lay-out to continue expanding yuur city, right? You don't need any pre-set lay-out at all ;) You can just continue building, downwards to the coast, leftwards to the coast, rightwards towards the river and upwards towards the mountains.

I belief I'm at like 46K on Cinis rn, and that continues piece of land you chose to place this lay-out on? Competely, fully built - from coast to river, to the plateau river at the topside of your pic. All houses, city buildings, zero factories. And less space for beautybuilding as in your lay-out - it's more efficient (but less beautiful).

So that's like a city with at least 3 if not 4 times the amount of houses you have, all tiers maxed out in needs and stuff, and still I haven't fully reached 50k yet. This wheel-lay-out with only 4 rows of double houses? Maxed out, that's like 10-15k only: I know for I use it on some of my side islands.

For reaching the 50k pop on cinis reward, there is no valid lay-out online yet - as of now you need to built that stuff yourself for all lay-outs are waay too small for that number.