Large diaphragm mics are some of the most physically sensitive mics out there (behind ribbon mics) and as a result, the owners aren't typically inclined to loan them out. Some companies that lease them demand a deposit equal to their total value, and understandably so.
I think a better option might be for you to purchase an excellent, lower-cost mic and keep it for your third project as well. May I suggest the Rode NT1? I prefer the NT1 at $269 but you can get the earlier NT1A for $199 and it will probably do as well for you. The NT1 is just a little smoother. We've got both here at the studio and they are both nice-sounding and robust. You can find them used on
Reverb for quite a bit less than retail.
All the best,
Bob