22LR and WMR Barrel
I'll have to agree with Rickyp about a lot of what he said. But -OTOH- there's a few other things to consider. Custom barrels are nice, matter of fact, I have a couple of VVCG barrels and they are both more than satisfactory. You say the 22LR barrel is for some informal squirrel and sillywet shooting. For that I can't see much benefit for spending $310 on something you can match for accuracy with a used match 22 TC barrel.
If you do choose to pay that much for a 14" rimfire, you'd better plan on keeping it because you'll have a helluva time getting more than $200 on a resale. Even if you choose the VVCG barrel, you can choose a factory type forearm. The trigger job can be done for about $8. With minimal skills you can do it yourself with the addition of a different spring. I'll not say anymore about that.
The frame and the scope are either necessary are already bought and I guess the conversion kit is needed. So, you got:
$260 for the frame (could have gotten a used one for $175)
$160 for the scope (no comment)
$45 for the rimfire conversion
$150 for the barrel
$7 for a Weaver base
$20 for inexspensive rings (no need for pricey rings for a rimfire)
$8 new trigger spring
forearm- not necessary
trigger job- not necessary
Looks like $650. I saved you $260, you can send me half of that for the consulting fee