Re: bullet to lands, max distance?
Sounds like he doesn't want to do the job. I am certain if you shop around you could get a barrel installed for far less. IMO you don't have to blueprint the action to have reasonable accuracy. Heck I have several sporters that have Rem take off barrels installed with no other work done and they shoot 1/2 MOA or better.
In the meantime be sure your barrel is clean, bedding is sound, action screws tight, crown in good shape then go ahead and make a load for your rifle.