Hmmm, glad you asked, not many do? Hah ha ha.
Seriously, $180K is not alot of money today, but for a 19 yr. old its a good sum.
Tell him to invest it in his future.....
Go and interview all the successful business people you know and find out what career and 'lifestyle' you'd like to have. Make a serious investment in researching actual people, who have the successful things in life you would one day hope for.
Once you've determined what career path you'd like to follow, go out and get the education; the very best education for that field of work. Enjoy your time at college/univ., but keep your focus on the goals..... being the best at what you do and making lots of dough!
After your education, go into the career with the best companies; offer your services for high management positions with low pay, just for experience and abilities to prove what you know. Work for 3 or 4 firms of different sizes and learn all the management you can. Offer to do everything and anything.
Once you've got the education, experience and perhaps (not likely) some money left.... go start your own business and be your own boss! Your friend will enjoy the lifestyle that only 1/10th of 1% enjoy.
A good book is "Rich Man, Poor Man" and then all the sequels which really get into details of investments, business and success.
Real estate is a good investment, that's for sure; but $180K won't get you far. Use part of the money to buy accomodation so you're not renting, but getting a good education in a good field will be your best choice, if you have the money, time and smarts.
whew!, that was fun.