everyone wants something for nothing
If some guy charges you $900-$1500 or $250/hr to tell YOU that YOUR car will not
KILL YOU, YOUR FAMILY, YOUR FRIENDS or anyone ELSE because of how YOU have modified it, then you can thank him that YOUR life is so bloody CHEAP.
What price would you have him put on YOUR life?
sure some of you don't give a rats if you live or die, but he also has a responsibility to the rest of the community - and that includes me BTW - so be thankful that the couple of hundred thousand people you drive past in the life of the car are also so cheap to NOT KILL.
/rant
All the above is fine IF the Engineers you pay to point out whether your conversion is well engineered and safe....actually do their job. From what I've seen and heard, some just do a risk assessment based on whether they think you are capable of doing the "right" thing, sound like you know the rules and maybe whether you are capable of following good engineering practice....at best..its a lucky dip....do your homework before undertaking any conversion...its YOUR life.