I would suggest that you start with an exercise that costs nothing but is very important to the outcome: write down your theme for the truck....not just "show truck" but make a spreadsheet of every component and write a plan for each. The theme might be "mild custom truck that can be competitive at a show while still driven on the street." For your list of components, you might have entries (Excel makes a good platform to work in) such as FENDER, Front with comments like "remove side marker lights and K10 emblems" Under dash, you would spell out your intended gauges, radio, switches that kept with your theme......this way, you can plan the build so you dont end up with contradictory components like a billet air conditioning knob on a stock dash.....
Then, you can keep making revisions to your plan as your theme changes during the build process. From your spreadsheet, you can also assign cost dollar amounts to the components to see what your total might be (of course, the total cost will escalate as all project costs do). You can plug in an average show quality paint job of $25,000 for instance and see where that goes in your budget.

mike in tucson