What is the condition and health of your lawn and landscape at this time? Will it require a lot of attention to get it in shape and perhaps less at a later time?
In these cases, we may want to give one bid for an initial renovation program, with a discounted price for subsequent months when services become more of a maintenance program.
Think this one through carefully. Once the yard is looking good, you may be tempted to take over the weekly chores. If you do that, then slack off, you risk losing the investment it took to get it healthy and attractive.