Hello there ,
I am sorry about my english , it’s not my first language , please be lenient …
A lot of Indie Dev like me can not buy a license as ZBrush, so why , i ask to Zbrush Crew if you will make something ?
I don’t know , a monthly subscription ? Example , look at Allegorithmic and his Substance Live subscription (a rent-to-own acces to the toolset). If you paie for month , you can use the tools , Once the remaining amount reaches $0, your licence will switch to a perpetual (lifetime) license and remaining amount can be paid at any moment.
I think , it’s can be good for you too , today , we can see of ton of indie dev in the game industry.
I hope that you will make my dream come true
Thank you for reading me
Have a great day