Lots of good options. If your center already uses a particular brand for reusable scopes (Olympus, storz, Pentax, etc) and already has equipment to process them, pretty cheap to buy/lease a flexible laryngoscope in that system. How many you need will depend on your cleaning speed and case volume of course.
The cheapest entry option would be disposable scopes. I know Olympus has them as does Ambu. If you’re doing lower volume these may be more cost effective early on and then can purchase reusable once the needs are known and it makes financial sense. Check with your ent if they want to take pictures or videos as that’s a bit clunkier in disposable systems. Olympus and Pentax can just port directly into their cloud storage options.
There’s definitely a point where disposable loses money - my hospital floated the idea once for my clinic and ran the numbers - would have cost them $2.2m a year in scopes! So that idea died quickly! Surgicenter may be different though since you may be able to recoup the unit cost in your facility fee.
Overall I think DISE is a complete waste of time. It’s pretty obvious from the office scope who is a candidate. As such, I don’t think any ent really cares what kind of scope it is since we’re basically just going through the motions to satisfy the insurance gods.