Regarding your order:
- Pay off credit card first, not paying 10% is like making 10%
- Consider an emergency fund equal to 3-6 months of your living expenses
As for your questions, here's what I think
Set 1:
1. Don't know, never tried
2. I like the Roth. I can pull the money out tax free when I retire. Which I think is pretty cool. Granted I have to pay taxes on that money before I invest it. But really both are good so don't stress worry about it.
3. The type of account doesn't really cause it to struggle. It's about what you've invested in. Most folk here will say to invest it and then not look at it again. Don't pull your money out. If your fearful of the market be more conservative in your investments (more bonds and CDs)
Set 2:
1. That's up to you and your investment strategy
2. You might want to look at vanguard's other funds. I bet there are a few that are well balanced between large, mid and small. I know there are a few folks who only invest in the Total Stock Market and Bonds. If you search this sub-forum more there's a bunch of discussions on which vanguard funds are favorites.
3. If that's what's available then I don't see what your other options are
4. You should come up with your ideal portfolio allocation and stick to that, rebalancing as needed. Boogleheads are another group that has a lot to say about getting to that ideal allocation.
Your heading in the right direction. Is the plan solid? Hard to say, what's your target number if you are going to retire in 10 years? My napkin math has you at about $400,000 in ten years. My assumptions: you invest 20K each year, your investments grow by 6%, you currently have 70,000 invested. I'm not including your house because you will continue to live in it.
70000(1.06)^10 + (20,000(1.06)^10) + (20,000(1.06)^9) ..... (20,000(1.06)^1) = $404,000