I believe investing in cards and renting them is a perfect match for INDEX!
Let the gaming part for the Guild ;)

I like Hive account@dagger212 idea for a plot too! Quite an investment though but would be a nice pump for SPS!
About renting the cards to INDEX holders could be a bit limited while renting out to the public would be easier and probably quicker to get earnings right away and always in automation, so everything flows automagically. Every idea is welcome so we can all get the best profits possible so it is a thing to be considered anyway!

Would it be a variety of cards or focusing on one and getting it maxed? or both?

INDEX to the Moon!! 🚀