Kidding aside, I think the key to your strategy is right there. Go with a plan (sounds like you now have one) but if nothing that fits the plan is available at your number, don't force it. Go home empty-handed and wait for the next con. Exception: no plan targets available BUT a true bargain you know you can flip presents itself. Then "settle" for that; flip it ASAP, and grow the war chest before the next con, where you attempt the plan again.
as to my 2 cents on the plan itself, I like X-Men #1 too but I like GA Bats as much. X1 is pretty common as top tier Marvel keys go, so get the nicest on you can. It is priced low these days it seems. I also like a really nice X-Men 94 as its tough in high grade and cheap these days too. For silver bats, I like 181 and Tec 359 a lot.