Hi Kevin, If you're looking to keep it cheap for the time being, this is what I'd do.
First, Bag the idea of using the 50 amp power supply, unless you are going to buy a 60 amp charge controller to properly charge the batteries. This link will help you with the battery aspect of your project.
http://www.otherpower.com/otherpower_battery.html
Next, figure out what the maximum output of your wind and solar to select a big enough controller. Keep in mind that the wind turbine MUST be connected DIRECTLY to the batteries (through rectifier diodes, of course), and the controller MUST be a DIVERSION of DUMP LOAD type controller. That in mind, you might as well connect the solar panels the same way, and use just one controller. This setup allows you to use the excess power to heating hot water in the future, or other such tasks, instead of letting that power go to waste, while your saving money for more batteries }:)!!
If you starter system is 120 watts or less, and you are into building your own Dump Load Controller, Ghurd offers a great little kit! (link below)
http://www.fieldlines.com/story/2007/8/24/172521/889
If you want to get something larger, to leave room for expanding your system, I recommend using a Xantrex C-Series Controller. If you planning to go 48v in the future, get the C-40. (link below)
http://stores.mavericksolar.com/-strse-Xantrex-cln-Solar-Charge-Controllers/Categories.bok
Blessings, Snow Crow