Back in the 1960's when my K98 was sporterized, you could have a gunsmith do it and still come in only a little more expensive than a high quality commercial sporter, but gunsmiths back then were charging maybe a dollar or two per hour...Depending on what you want done, and starting with an issue 98 Mauser military rifle, you might get away with $800, but not much below that...
My K98 as taken down to the bare steel, polished, re-barreled with a good commercial .308 Win barrel. The bolt handle was bent low and polished, the bolt itself was jeweled and squared to the receiver, the safety was replaced with a Buehler low safety to clear the scope. the reveiver was drilled and tapped for scope mounts and Weaver mounts installed. The whole thing was very nicely tank blued, leaving the bolt and handle in the white, and put into a commercial walnut stock with a recoil pad and sling swivels. When I bought it, it had Weaver steel mounts and an imported 4x scope...I replaced that with heavy weight steel mounts and an old US Redfield 2.5 x 7, replaced the stock with a black plastic one and just added a Timney Sportsman trigger last weekend. I have under $400 i .243n it as it is now.
BUT remember, the hard and expensive work was already done when I bought it.
I am sure prices will vary from place to place, and I may be way under - I doubt I am high on the estimate.
mark
Reading this, I realize I forgot the cost of the scope...I had bought it earlier for another project tht got changed around an I never used it...it was around $200 by itsef, and I was very happy to find it for that price.
The safety on the Yugo is the standard Mauser 3 position safety at the end of the bolt...works great, but it is too high to be used with a scope mount and needs to be changed, as does the bolt handle...
FWIW, if I wanted another bolt military rifle to hunt with as is, I'd buy that Argie and just clean it up good and use it as issued. That rifle is a steal at that price.
Last time I wanted to sporterize a surplus rifle, I decided to just take the money and buy a new Savage .243 instead.