English to German Bus/Financial Finance (general)

Ich weiß, dass es für premium bereits jede Menge an Kudoz-Einträgen gibt, aber ich verstehe den Unterschied der unten genannten Optionen trotzdem nicht. Eigentlich tendiere ich zu:
premium > regelmäßige Beitragszahlung
Aber was ist dann der Unterschied zu Miete (rental) und Abonnement (subscription)?

Kontext: Umfrage bei Ärzten und Krankenhauspersonal für die Anschaffung von Infusionspumpen.

Which of the following is your preferred payment method?
• Pay upfront cost for devices (one-time capital equipment purchase and additional cost for IV sets)
• No upfront cost, payment via ****premium**** on IV set with annual purchase commitments on IV set usage
• Rental of devices– (additional cost for IV sets and software applications)
• Subscription – 5 years (cost of capital equipment, software and services divided among length of contract – one set cost monthly for the duration of the contract)
• Risk Sharing – Payment based on performance against jointly defined goals with the manufacture and hospital (lower up front payment with annual payment based on defined metrics)

Payment Options
• Upfront payment for infusion solution + IV sets as used
• Subscription Model (Monthly) + IV sets as used
• Consumables (IV set ****premium****) purchase only
• Risk Sharing - Payment based on performance against jointly defined goals with hospital