Cool - which ones (can you post the link)?
Remember, to build just the regular B52 you'll need 4 of these (one in each pod), 4 ESCs (probably 60A), and batteries. You will probably need
four 4S batteries in the 1800mAh to 2200mAh range. You can go with fewer batteries of higher capacity but then they will probably only every be useful for bigger builds.
Do you have a lipo balancer / charger and a lipo checker?
You'll need pretty sturdy servos (the 9 gram FT ones probably wont cut it for this size build)
DamoRC
p.s. - Do you have access to a laptop / computer? Probably be useful for the design / calculation / measurement work that you will need to do (like the dimension stuff I did above with Sketchup).
DamoRC
EDIT - oops , hit post and then saw
@Chuppster's reply. Agree, on my more advanced projects I try to lock basic dimensions etc early so I can work out the budget, or if I have the parts already, or if I have to strip (or, ahem, crash and strip) one of my other planes.