Cost of injectables

Ok ladies I have a question. I've had 4 failed cycles with Clomid. I talked to my dr this morning. She said I can a.) take Clomid for 2 more cycles. b.) switch to Letrozole. c.) go right into IUI with Clomid or d.) try injectables. I'm leaning towards the injectables but I'd like to hear your thoughts. I'm also curious about the cost of the medications as insurance wouldn't cover them. I'm not sure yet which medications my dr plans on giving me.