OK you wanted cost and time....here you go. The CFI depends on a few things:
-Your motivation
-Your ability to self study and work/practice independently
-You need a instrument rating and commercial in type (single/mulit)
If are highly motivated and can do most of the work on your own it wont cost you over 3,000.00 at the most (I think mine cost about 2200, with 20 hours of ground and 12 hours of 172 RG time) Plan on 20-30 hours brief and about 10-15 hours of flying. The II is an add on, I do not know if you can take the ride the same day (I honestly dont know why you would, the CFI is a full day or two on its own). You can do a MEI first and add on single enging priv (u must be multi commerical rated). Before you do your CFI take both the FOI and FIA, and put together your binder of lesson plans, and then go to start. But heres my advice, get your CFI, find a job, teach for a couple months, and then get your II. Dont worry about your MEI, only high time instructors teach multi, and you might be off flying frieght or have a twin job by then, so take that when it comes.

Hope this helps