Rapheal,
None have mentioned what just might be your best option:
Caves Valley: great experience, close proximity, competitive affinity, can be used for business hosting and relatively reasonable.
Before you go off and listen to all these other GCA recommendations, be sure to realize your fellow's chances of getting into even the Friars Head's and Sebonack's are nil and unlikely. Neither place "just accepts a check," instead both owners are stringently seeking members who fit the profile of their personal goal of a "great" club. Frankly, it's rare in today's "uber-club" world that the likes of Ken Bakst and Mike Pascucci have the wisdom and vision to avoid such compromise. Both will probably end up mirroring the very real desirability and exclusity of those places like Shinnecock, Winged Foot, NGLA, etc...
Places like Liberty National;The Bridge (Cary: $500k for this POS); Trump (any one of them); Hudson National; Bull's Bay: Hamilton Farm, etc will accept your check and convey membership immediately. All of this and you can have some "Press-tige" to boot!
A wiser strategy would be to pick a handful of "destination" clubs for less $$ (i.e BallyNeal, Dismal River, Secession, Hidden Creek, Stone Eagle, Chechessee Creek) and creat a package of great experiences.
Also, forget about Yeamans Hall...they have no interest in members who haven't got the social chops to blend right in.
Good Luck!