No experience with cashing out more than $5k in one hit but I have to say Red Kings have always seemed pretty decent in my experience. I play almost exclusively on Ongame and they have amongst the best customer service of any skin in my opinion. They give constant bonuses, always reply to questions fast and seem to have a bit of a personal touch. I would email
accountmanager@redkings.com and just ask what their transfer limits are.
Also, have you tried Best Poker? I know if you become a Platinum VIP player there (60k points within 3 months which is easily acheivable even at MSNL) you get personal support etc. as well as loads of bonuses. Could email
VIP@bestpoker.com and ask them about daily cash out limits also.