First of all, what @goldstein says is very much correct, Especially considering most nerds and/or geeks will usually compile you something for free if you ask nice. Compiling is usually a pretty straight Forward process that simply takes some time.
Here is a guide on how to do it yourself: https://www.whonix.org/wiki/Dev/BuildDocumentation
Furthermore, regarding the trust question, please regard this: https://www.whonix.org/wiki/Trust
Whonix “Fails safe” meaning, in Default (and most possible configuration) there is no way for IP leaks to occur by design.
Regarding the trust page, furthermore, Whonix isn’t really a “fortress “kit”” you’d have to build yourself. It’s more a question of to what degree you trust the premade builds by the People behind Whonix. Verifying them obviously is a must in any case, by the way.
Also, if you would like (though you obviously don’t have to and please don’t feel preasured into doing it) you may want to consider sending the Name of the repair shop via my email address "firstname.lastname@example.org". My GPG key may be found under my Profile.
The reason why I ask is that for one, it really isn’t very Kind to attempt to gain 150$ by making false Statements about an open source product. Secondly, letting a third Party (like him) handle the build process for you is, without proper verification and checks, in most cases to be considered less secure then taking the premade build from whonix.org.
Obviously, you shouldn’t and don’t have to write me the Name of the shop if you believe that it may in any way lead to you being more tracable, which due to the local nature of such Shops is very much a possibility.
Have a nice day,