If you really want an M1A, then by all means, get one. As others have mentioned earlier, it's rare to have $2000 to spend, but a spare $100-200 is fairly common.
The point I was making earlier is that some rifles are pretty exceptional and if they're also cheap to shoot then they'll end up being favorites. That rifle that shoots 2 MOA with cheap ammo and handles well and feels well made is probably going to end up being one of the rifles you always end up taking to the range with you. Your Mosin Nagant and SKS would probably be rifles that I wouldn't shoot that much, unless they were much better than the ones I own. The Garand however would be in a different category. Those are neat rifles with great sights and terrific workmanship and there is reasonable 30-06 ammo out there.