I can tell u that me personally and among other people that still play the game but are tired of farming, this would be so incredible. $5 is incredible for this and I would definitely pay for that. If this is true then keep up the work man and I truly hope you can work on the full release.
It's awesome to see people still working to create tools for trove! Keep up the great work!
As for your question of would you be willing to spend $5/m for a trove bot, I would if the personal use cases were more compelling compared to free options.
Currently there's already free Auto Farms out there.
In game settings also have the option to filter type of gear you pick up (shadow+).
There is a Tmod that auto reconnects (doesn't reopen client if hard crash)
So currently there's not enough value for me to swap to a premium version.
What would personally get me to pay would be an all-inclusive bot for my current needs or at least some features, more then just auto farming.
Some example of this would be...
-Automated Dragon Coin Event (I don't need coins but its a great idea you mentioned)
-Weekly Contest Bots (Geode bronze egg collector(50 weekly), Club Quest farmer(45 quest) Delve farmer(6 cache))
-Targeted D15 5 Star Cleaner (instead of farming 5star solo, it would be a set up for cleaners that sit around waiting for invites)
-Auto Gem Upgrade (open gem box and upgrade gems to certain level, loot collect, repeat)
Anyways you get the the point. According too your roadmap you're also heading in the right direction.
On another note, I would also like to say that since 64bit update most of the bots broke. So it's a huge opportunity and benefit to the community to have an active dev updating/creating bots. You might get subscriptions based off that alone.