I wish there was some sort of "$40 for 40 hours" (eg: sketchup), and even better if there were some sort of "Humble Bundle" where you could do "$100 for 100 day

I wish there was some sort of "$40 for 40 hours" (eg: sketchup), and even better if there were some sort of "Humble Bundle" where you could do "$100 for 100 days of usage on any of ...these... services". A lot of time I need the tool for a project (eg: one week), and would rather look for something open source or non-subscription-based since agreeing to ANY subscription to an important tool temporarily is akin to agreeing to it permanently. It's not the same as "rent a rug cleaner from Home Depot" where there's competition, low learning curve, high compatibility, etc.