I usually carry tools and laptops

On every call i always bring a netbook and a basic tools kit.

And depending on the call i can bring any where from soldering iron, Helping hands heat guns, SATA - USB adapters, Dvd for every operating system, power supply testers, precision tool kits, Multimeter's ETC ETC


In total it could weight me down almost 20 pounds or more.

And more often then not i will have to take a laptop or two back with me.

A average latop weights five pounds.

...

Also what are the difference with a $15 dollar rack and a $25 dollar one?

and what bags should i get?

(I have a $50 budget for this)