Go into knowing that you are going spend alot more than if you can find one already converted.
I have probably done 10 conversions over the years, and did okay when the cue market was hot. I could even make a little on each of them.
But now if you have to buy a titlist they are fewer nice ones that are good candidates for conversion, and you pay a fortune.
My advice is to look at the used cue market, as it is down and there are some incredible deals (compared to a number of years ago.) It will also tell you how much you could sell one for if you had one converted, and compare that to what you will have to spend.
My other advice is you can get a much nicer looking cue and for alot less money, if you go to Prather or others for one of their blanks instead of using a conversion cue.
If you STILL want to do the conversion, I recommend Rick Howard of Mace cues. Probably the best cuemaker for the money, IMO.