Realize that most of the value in that type of land in MS, is the timber itself.....it's not just a bonus.  

You may have tried some of these already, but: showmojo.com, hotpads, zillow, trulia, craigslist, facebook area renting groups, advertising move-in specials, contacting all of your good current and past tenants (when possible) and giving them a referral bonus, direct mail postcards to other apartment tenants (check local laws/codes), putting up flyers at local businesses and schools, calling HR departments to get on their housing lists for any relocating employees, calling non-profits orgs who provide housing for special needs folks, call your local HUD office, etc.I normally try for a 15-18 month lease this time of year so that you won't have the same issue next time the unit vacates.  

Almost like a bonus?

Make sure it is fair and you get rewarded for doing a good job.Maybe you structure it 1/3 around but get a bonus if it performs at XX%.

Hello! I am a new member.

It worked well, and the bonus was that the laundry room was toasty enough to dry light clothes on a rack!

You may also want to sign up for Credit Karma (www.creditkarma.com).

Welcome to BP,  sign up for the webinars and read everything you can find here. 

Investor would get interested in a 8% return + a bonus if/when the guy buys the property....

Be sure to sign up for the weekly webinar they contain plenty of information for both the new and experienced real estate investor Make it Happen Steve