One of the great things about leaserigs is that it allows providers to set different types of rates.
When I started I used higher prices for short rentals and lower prices for long rentals, that seemed logical to me to offer the best rates for longer commitments.
Once my number of rigs increased it just became too much of hassle to keep changing them all so swapped to the flat rate scheme.
Having said that I can see what you are saying about making it easier for customers to find the types of rigs that they want
Maybe a new icon could be added
[-] flat rate
[\] tiered pricing.