I will second SRT8's post, my previous company also aimed for 120k plus 20k in enhancements with a 2 man crew. In the Southeast, we have very different summer and winter seasons. We would keep our key employees full time all year and hire additional workers, such as college students on summer break, for the busier summer months.
I would consider an enhancement to be a small "landscape" job that your "maintenance" crew could do for an existing customer. Preferably, while they are on site doing a visit. Enhancements could include such items as; mulch, seasonal flowers, small plantings, fertilizer, etc. Our enhancements typically took less than half a day and would usually not require special equipment, like skid steers or tractors.