Top Heavy in Cash - VanGuard the way to go?

[drumstache]

Greetings all, new to the MMM site.  Enjoying the articles, and re-evaluating some things.

I'm 47.  No Debt.  Max out the 401K, have an external IRA that I max out the 5500. As well.

Currently have:
282K invested (401, rollovers, IRA) etc
75K in my son's college fund.
135,000 in cash.

Was looking into investing in buying a rental house, but I work a full-time job, play in 2 bands that keep me busy most weekends.  Thinking that it would not be a good fit at this time.

So, I guess I've made up my mind to funnel some of the excess cash to a Van Guard fund.  Maybe the 2030 target fund. 

Is the Total Stock Market Index Fund a bad idea for someone my age?

Also, instead of dumping it in all at once... probably need to spread it out over the year?

Thanks for any advice offered.

[Aggie1999]

Statistically dumping 100% of your cash in at once wins out the majority of time versus spreading out the investment (i.e. dollar cost averaging).

[drumstache]

Thanks all for the suggestions.

Been reading through http://jlcollinsnh.com/stock-series/ Blog.  Good stuff.

I also signed up at Personal Capital, nice site...  Very helpful as I have investments spread out from past 401's.  Got a good overview of where everything's at and where I need to re-balance.