Re: SPS or 110 savage
If $500 is the extent of your budget, that will pretty much just buy you a rifle. Mount your existing rings/bases/scope on it and you're done.
If you want to build from that, it's going to cost you more.....
Trigger Job ~$60
New Stock ~$150+ (150 would be the low end, think more along the lines of $300 plus to get a good stock)
Rebarrel ~$600 (this would include the gunsmith fee to install) although if you went with the savage you could buy a barrel for ~$250 and install it yourself.
I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!