Ok, then if your sure. Crawling is cheaper in the long run because there are less repairs. But most of your expense comes from upgrades. I recommend running it, getting a feel for it, before running out and spending money on upgrades. Just because that's what everyone else says is the best...
But you can just as easily make a 1/24 course using the same exact locations, with the added bonus of being able to still set up a course indoors when the weather won't allow you to go out and run your rc.
If your heart is set on a 1/10 scale, go for it. But you will have to be patient...