@Phillip Rosin
Hello, i just joined BP and found your question very interesting. I am sorry if many pointed to same of my thoughts. I didnt read all of answers:
To be precise in the answer i will have to ask you to check if all the loans ( student and car) allows you to pay down, AND, discount the interest charged from the principal. In other words, they have to charge only principal and not principal plus interest.
If thats the case, my answer is simple: PAY DOWN THE DEBT! That reason lies in 2 factors: 1) In REI you will be able to raise money at much lower rates: specially if you have a good money to invest ( as downpayment).
2) The effect of taxation: paying down the loan has an effect of an investment of higher return. Imagine for exemple you pay around 40% in income tax (rounded number). A 5% loan to match is equivalent to an investment returning about 8.2% ( where you would pay around 3,3% of it in taxes-all rounded numbers). Not many REI will give you a certain return.
If i remember well your student loan is around 55k and car 9.5k. If they charge principal only, You might need to disburse only 50k on both, giving u ability to invest 55 k and get loan to add. Remember you will have 550,00 per month to pay for it. And cost will be lower than 5%!!! Its a win win situation. If you dont find anything to invest in short term, your money was properly invested. If you find the financials will be better than what you have now.
Hope i was clear to paint the picture. Anything let me know
Rgds