If you got 1-2 years to wait, then invest in Articles (do a keyword research) and then in Backlinks.
If done properly, you'll start getting organic traffic in 3 months. In 6-12 months you'll peak your SERP's.
From there you have a decision to make, keep earning $XXXX,00 per month or seel the website with a multiplicator of 24 times your monthly revenue.
If for example, you earn a $1K per month with that website, then selling it for $24K, you would have made back ~500% (if you invested 5K).
Now rinse and repeat. With those $25K you can invest in 5 more sites, or invest in 1 site, and keep $20K for yourself.