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Investment strategy for a 20 year old with about 30k in bank account
Thanks for your service.   I would avoid personal investment opportunities at this point.  Reason being that you can't personally oversee them if you are deployed overseas.  This would rule out rentals and small businesses.  Revisit those possibilities if you get married or leave the service.   If you have a definite time when you would like to purchase a car, you could buy a six or twelve month CD with the funds that you need for that.  That will slightly bump up your returns without taking much risk.  If you don't really need to buy the car, you could invest that money in stocks.  Then if the stock market tanks, you wait until it recovers (note that that can be five to ten years) or until you build up your savings again.  That increases your reward at a significant increase in your risk.  The risk being that you might not be able to buy a car for several more years.   Build an emergency fund.  I would recommend six months of income.  Reason being that your current circumstances are likely to change in an emergency.  If you leave the service, your expenses increase a lot.  If nothing else, the army stops providing room for you.  That takes your expenses from trivial to a third of your income.  So basing your emergency fund on expenses is likely to leave you short of what you need if your emergency leaves you out of the service.   Army pay seems like a lot because room (and board when deployed) are provided.  Without that, it's actually not that much.  It's your low expenses that make you feel flush, not your income.  If you made the same pay in civilian life, you'd likely feel rather poor.   $30,000 sounds like a lot of money, but it really isn't.  The median household income is a little over $50,000, so the median emergency fund should be something like $25,000 on the income standard.  On the expenses standard, the emergency fund should be at least $15,000.  The $15,000 remainder would buy a cheap new car or a good used car.  The $5000 remainder from the income standard would give you a decent used car.   I wouldn't recommend taking out a loan because you don't want to get stuck paying a loan on a car you can't drive because you deployed.  Note that if you are out of contact, in the hospital, or captured, you may not be able to respond if there is a problem with the car or the loan.  If you pay cash, you can leave the car with family and let them take care of things in case of a deployment.   If you invested in a Roth IRA in January of 2016, you could have invested in either 2015 or 2016.  If 2015, you can invest again for 2016.  If not, you can invest for 2017 in three months.  You may already know all that, but it seemed worth making explicit.   The Thrift Savings Plan (TSP) allows you to invest up to $18,000 a year.  If you're investing less than that, you could simply boost it to the limit.  You apparently have an extra $10,000 that you could contribute.  A 60% or 70% contribution is quite possible while in the army.  If you max out your retirement savings now, it will give you more options when you leave the service.  Or even if you just move out of base housing.   If your TSP is maxed out, I would suggest automatically investing a portion of your income in a regular taxable mutual fund account.  Most other investment opportunities require help to make work automatically.  You essentially have to turn the money over to some individual you trust.  Securities can be automated so that your investment grows automatically even when you are out of touch.