Do you know what kind of peppers you'll be getting? That will make a difference for me. If it's red or green jalapenos/ fresnos/ serranos/ cayennes or things like that I'd go pretty basic.
Try to keep them either all red or all green. Aesthetically a mix of the two makes for an unappealing looking sauce.
If it's green I'd tend to keep it fresh- the peppers, some scallions, some garlic, water , vinegar ( I prefer apple cider vinegar when making vinegar based hot sauces), some salt and a pinch of sugar. If you want a little bit of cilantro is not going to hurt. If you can get your hands on some tomatillos a very few of them would go great here. Too many and you will get tomatillo salsa, which is no bad thing, but that limits it's use.
If it's red substitute scallion with white onion, and maybe more of it, and omit the cilantro. If it is something that has a bit of fruitiness and sweetness like fresnos you can bring that up with some red bell pepper or shredded carrot. You'll want to be careful with both of those ingredients as they can tone the heat down quickly.
If you get other peppers I can give you better pointers when you've got them, such as if you get hotter peppers like Scotch bonnets and you like mustard, you could do a Bajan hot sauce.
@skywatch might have a few ideas for you as well.