What do you mean by hit servers?
It seems like a model processing problem, not a wireframe problem. It really does not matter if your model has 5 or 130 properties - this should not be noticeable to the user. Double-check the model processing code for lengthy operations. If the model object is so big, I'm sure there is somewhere.
In addition, I would advise checking the client-server connection for any problems (javascript, heavy forms, etc.). The built-in tools in IE9 / Chrome and Fiddler are enough to track these problems.
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