I would have to disagree with this one. The budget and needs should fit the resource, i.e. I could do the renderings and provide the items you mentioned but I would be charging $150 per hour (perhaps overkill - - same as my professional job, if all i need is sketches done then im not going to a design firm that charges $150 and paying them high dollars when i can give the work to a student if i have access to them. I of course would talk with the professor and ask which student is reliable and make sure my project schedule would accommodate their availability. I have done this in the past and was extremely happy with the level of work and professionalism the student provided.