And they must want to mass produce.For that,we need either centralized state,or religion.
Since building centralized state is not easy,i would use religion - Mochamet in OTL could turn desert tribes into Conqerors who created Empire on bodies of another empires in that way.
Great Michianger...
If Great Michianger was creator of new religion who would support that,then yes.Remember,industrial revolution was possible becouse people who made it was christians.
About patatoes - according to what i read,higlanders in South america mountains live eating patato soup,fried patatoes,and patato deserts,so ,when our Michigans finally get there on their ships,they could live by patatoes,too.
Mooses could be domescitated,and it was in one regard better then horse - it could run on bog.For that reason,thieves used it in Europe - i read,that in some german states every man captured on moose was considered as bandit and hanged.
Back to topic - i think,that we could have iron...