I tend to agree and disagree with some of the replies.
First, $150 is out of line for something that you will end up with all the rights to. Unless you manage to find a sucker or someone who absolutely has no idea what their doing, that's probably never going to happen. An 11x14 print just doesn't cut it as far as compensation.
Most photographer's are going to want to shoot their own models and I'd be very surprised if they didn't have their own D/SLR camera that they're already familiar with. I certainly wouldn't want to spend paid time learning how to use YOUR camera.
I would recommend offering to rent the studio out on a day and half day rate. Include your lighting kit as well as a small refrigerator stocked with free drinks (soda and bottled water). I would also think about gathering as many props as possible such as used furniture and stuff (cheap through garage sales and private parties), Don't offer anything models would use in an intimate way including lingerie. These are generally very personal items and you'll go broke trying to stock an ample wardrobe of various sizes. Something to seriously consider as well is liability insurance.
What happens if a photographer shoots underage models in YOUR studio or if someone gets hurt?
You apparently have a few models looking for work and want to offer them as well, but I would make this a separate offer, apart from the studio rental. You're also going to need to invest in a better lighting system but that can probably wait until you have a few rentals. You also said small studio, so you may or may not be able to incorporate the props I mentioned, at least not the larger ones.
As for the photo's - they belong to the photographer, not you. Otherwise I'd be better off just paying the model or someone else to rent their home or apartment and do my shoot in a more "natural" space.
Just something to think about. Hope it helps.