Hello,
Please indicate the HikaShop version that you're using ; it help the support team to provide you an answer regarding the features that you can have, like the new checkout system of HikaShop 3.
Thanks to a custom plugin (so custom development), you can dynamically change the checkout workflow depending elements like the cart content.
So, yes it is possible to imagine a plugin which will set a different workflow depending products.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.