Another opinion question

You really think that I could get more power for less money just building one? Don't get me wrong I'm not trying to argue with anybody. This will be the first motor I ever put together so I bearly know what I want let alone what I'm doing. The local "good" shops were giving me numbers like $6000 to $7000 to build a small block stroker. Did I explain things wrong to the shops or were they just giving me rediculously high estimates. It looked to me that MP 406 short block was actually cheaper then getting a core, having it machined, and then buying the rotating assembly. I think I'm more confused then when I started. Are my ideas that far off or was I talking to the wrong shops?