This place is a great resource, but for RD specific stuff, you should check out 2strokeworld.com . If it weren't for the guys on there, I would have thrown my RD350 off a cliff in frustration. There's a lot of guys on there who have been obsessed with RD's since they were new. I had the advantage when I got my RD that it was running, albeit shitty. You're definitely going to be spending some money, but it will be fun. The bikes are super fun, way beyond their actual abilities. Every time you fill it up with gas(often!) people will come up to you and tell you grandiose stories of how they had one that would do wheelies in 5th gear, etc. I've had a lot of fun with mine.
I wouldn't bring her home to Mama, but Mama ain't home tonight.