Most of your limb salvage patients are inpatients. A lot of them have an infected ulcer, are at high risk for ulcer, are on IV meds, or are in fairly urgent need of surgery (usually I&D, revascularization, reconstruction, or amp). You don't have to be full-time or have a clinic at the hospital to do limb salvage, but you would probably have to visit your patients in hospitals a fair amount (and be on call for new patients) if you want to focus on this arena. You could certainly do some of the follow-up on an outpatient basis... prosthesis and shoe fittings, post-ulcer site inspections, wound care after the limb-threatening insult or infection is tamed, etc.
A limb salvage team is more common in a big academic hospital and might consist of internist, vascular, podiatrist, infectious disease, endocrinologist, pedorthist, interventional radiologist, etc. You will see a fair amount of wound care and limb salvage in VA and community hospital settings also, but you might not have as many different specialists available.
A pretty good intro book is "Clinical Care of the Diabetic Foot" by Armstrong and Lavery. It's written in fairly simple terms that any pod student - and probably anyone who has had cell bio and a fundamental understanding of diabetes - can understand, but there is a still lot of good info.