The older simple bolt action .22s turn up pretty regular at the big box stores, and elsewhere; they used to be about $75, now generally $125ish, but they are often great shooters and will burn up that ammo fine. Some are odd-ball names, but were made by major US manufacturers under contract; ie, Savage/Stevens, Marlin, Mossberg. Every one Ive had and have are good shooters.
You can also get a chamber insert .223 to .22LR or to .22Mag, someone here has done so and may respond to you on accuracy to be expected, cost, where to buy, etc. The downside is that your scope setting will not work. If you use QD rings you could have swap scopes, but you still need to re-zero after a swap (it is more shooting) and some hold the -0- really well.
Cost of insert and scope to do swaps vs buying a cheaper old bolt .22 that is ready when you are?
Only you can answer that.