Blotto,
Thanks a lot for your detailed reply. I gather few very interesting observations from you viz.
1. Going through ccy futures on majors is a very good point indeed, provided If I can get 25 bucks in one go in futures markets (duing London hours) at a one pip spread that will be great. I haven't looked really at ccy futures, but will look at them tomorrow to see the liquidity.
2. About getting credit lines with banks, and doing 40 buck size in one go can be another solution. I might be able to do it. Any idea what kind of spread we are talking about on majors EUR, GBP, CHF, JPY during london/ny hours for 40bucks size and say 70 bucks size from banks.
3. Now, I am getting closer to the point where I might be able to go via EBS/Reuters route, and since I am concentrating primarily on majors, I do not have to be concerned too much about crosses and exotics at this stage as ccooper said.
To answer your question, basically I am looking at doing size during open and close it after few hours or so, strictly closing positions within 12-14 hours. Sometimes, it will be very feasible for me to enter in slices of say 2-5bucks each over EBS etc. over a period of 5-10 minutes, but at other times I will like to ideally get done in under a minute. I think then having a credit line set-up with few banks and doing trades in OTC market might be my best bet.
If everything goes as planned, I will explore ,more and report back on my findings. Thanks for your pointers!